diff --git a/exercises/split-second-stopwatch/canonical-data.json b/exercises/split-second-stopwatch/canonical-data.json
new file mode 100644
index 000000000..aa9cef89f
--- /dev/null
+++ b/exercises/split-second-stopwatch/canonical-data.json
@@ -0,0 +1,818 @@
+{
+  "exercise": "split-second-stopwatch",
+  "comments": [
+    "All times are formatted in '<hours>:<minutes>:<seconds>' format.",
+    "Hours, minutes, and seconds are formatted using two digits.",
+    "Thus 4 hours, 23 minutes, and 6 seconds is represented as '04:23:06'.",
+    "Tracks are free to convert these times into a format that is the most",
+    "appropriate for their language.",
+    "",
+    "The advanceTime command is used to simulate the passage of time.",
+    "Some tracks might be able to mock the system time, others might need",
+    "to provide some time-representing value, while others might need to",
+    "pass the current time as an argument to the other commands."
+  ],
+  "cases": [
+    {
+      "uuid": "ddb238ea-99d4-4eaa-a81d-3c917a525a23",
+      "description": "new stopwatch starts in ready state",
+      "property": "time",
+      "input": {
+        "commands": [
+          {
+            "command": "new"
+          },
+          {
+            "command": "state",
+            "expected": "ready"
+          }
+        ]
+      },
+      "expected": {}
+    },
+    {
+      "uuid": "b19635d4-08ad-4ac3-b87f-aca10e844071",
+      "description": "new stopwatch's current lap has no elapsed time",
+      "property": "time",
+      "input": {
+        "commands": [
+          {
+            "command": "new"
+          },
+          {
+            "command": "currentLap",
+            "expected": "00:00:00"
+          }
+        ]
+      },
+      "expected": {}
+    },
+    {
+      "uuid": "492eb532-268d-43ea-8a19-2a032067d335",
+      "description": "new stopwatch's total has no elapsed time",
+      "property": "time",
+      "input": {
+        "commands": [
+          {
+            "command": "new"
+          },
+          {
+            "command": "total",
+            "expected": "00:00:00"
+          }
+        ]
+      },
+      "expected": {}
+    },
+    {
+      "uuid": "8a892c1e-9ef7-4690-894e-e155a1fe4484",
+      "description": "new stopwatch does not have previous laps",
+      "property": "time",
+      "input": {
+        "commands": [
+          {
+            "command": "new"
+          },
+          {
+            "command": "previousLaps",
+            "expected": []
+          }
+        ]
+      },
+      "expected": {}
+    },
+    {
+      "uuid": "5b2705b6-a584-4042-ba3a-4ab8d0ab0281",
+      "description": "start from ready state changes state to running",
+      "property": "time",
+      "input": {
+        "commands": [
+          {
+            "command": "new"
+          },
+          {
+            "command": "start"
+          },
+          {
+            "command": "state",
+            "expected": "running"
+          }
+        ]
+      },
+      "expected": {}
+    },
+    {
+      "uuid": "748235ce-1109-440b-9898-0a431ea179b6",
+      "description": "start does not change previous laps",
+      "property": "time",
+      "input": {
+        "commands": [
+          {
+            "command": "new"
+          },
+          {
+            "command": "start"
+          },
+          {
+            "command": "previousLaps",
+            "expected": []
+          }
+        ]
+      },
+      "expected": {}
+    },
+    {
+      "uuid": "491487b1-593d-423e-a075-aa78d449ff1f",
+      "description": "start initiates time tracking for current lap",
+      "property": "time",
+      "input": {
+        "commands": [
+          {
+            "command": "new"
+          },
+          {
+            "command": "start"
+          },
+          {
+            "command": "advanceTime",
+            "by": "00:00:05"
+          },
+          {
+            "command": "currentLap",
+            "expected": "00:00:05"
+          }
+        ]
+      },
+      "expected": {}
+    },
+    {
+      "uuid": "a0a7ba2c-8db6-412c-b1b6-cb890e9b72ed",
+      "description": "start initiates time tracking for total",
+      "property": "time",
+      "input": {
+        "commands": [
+          {
+            "command": "new"
+          },
+          {
+            "command": "start"
+          },
+          {
+            "command": "advanceTime",
+            "by": "00:00:23"
+          },
+          {
+            "command": "total",
+            "expected": "00:00:23"
+          }
+        ]
+      },
+      "expected": {}
+    },
+    {
+      "uuid": "7f558a17-ef6d-4a5b-803a-f313af7c41d3",
+      "description": "start cannot be called from running state",
+      "property": "time",
+      "input": {
+        "commands": [
+          {
+            "command": "new"
+          },
+          {
+            "command": "start"
+          },
+          {
+            "command": "start",
+            "expected": {
+              "error": "cannot start an already running stopwatch"
+            }
+          }
+        ]
+      },
+      "expected": {}
+    },
+    {
+      "uuid": "32466eef-b2be-4d60-a927-e24fce52dab9",
+      "description": "stop from running state changes state to stopped",
+      "property": "time",
+      "input": {
+        "commands": [
+          {
+            "command": "new"
+          },
+          {
+            "command": "start"
+          },
+          {
+            "command": "stop"
+          },
+          {
+            "command": "state",
+            "expected": "stopped"
+          }
+        ]
+      },
+      "expected": {}
+    },
+    {
+      "uuid": "621eac4c-8f43-4d99-919c-4cad776d93df",
+      "description": "stop pauses time tracking for current lap",
+      "property": "time",
+      "input": {
+        "commands": [
+          {
+            "command": "new"
+          },
+          {
+            "command": "start"
+          },
+          {
+            "command": "advanceTime",
+            "by": "00:00:05"
+          },
+          {
+            "command": "stop"
+          },
+          {
+            "command": "advanceTime",
+            "by": "00:00:08"
+          },
+          {
+            "command": "currentLap",
+            "expected": "00:00:05"
+          }
+        ]
+      },
+      "expected": {}
+    },
+    {
+      "uuid": "465bcc82-7643-41f2-97ff-5e817cef8db4",
+      "description": "stop pauses time tracking for total",
+      "property": "time",
+      "input": {
+        "commands": [
+          {
+            "command": "new"
+          },
+          {
+            "command": "start"
+          },
+          {
+            "command": "advanceTime",
+            "by": "00:00:13"
+          },
+          {
+            "command": "stop"
+          },
+          {
+            "command": "advanceTime",
+            "by": "00:00:44"
+          },
+          {
+            "command": "total",
+            "expected": "00:00:13"
+          }
+        ]
+      },
+      "expected": {}
+    },
+    {
+      "uuid": "b1ba7454-d627-41ee-a078-891b2ed266fc",
+      "description": "stop cannot be called from ready state",
+      "property": "time",
+      "input": {
+        "commands": [
+          {
+            "command": "new"
+          },
+          {
+            "command": "stop",
+            "expected": {
+              "error": "cannot stop a stopwatch that is not running"
+            }
+          }
+        ]
+      },
+      "expected": {}
+    },
+    {
+      "uuid": "5c041078-0898-44dc-9d5b-8ebb5352626c",
+      "description": "stop cannot be called from stopped state",
+      "property": "time",
+      "input": {
+        "commands": [
+          {
+            "command": "new"
+          },
+          {
+            "command": "start"
+          },
+          {
+            "command": "stop"
+          },
+          {
+            "command": "stop",
+            "expected": {
+              "error": "cannot stop a stopwatch that is not running"
+            }
+          }
+        ]
+      },
+      "expected": {}
+    },
+    {
+      "uuid": "3f32171d-8fbf-46b6-bc2b-0810e1ec53b7",
+      "description": "start from stopped state changes state to running",
+      "property": "time",
+      "input": {
+        "commands": [
+          {
+            "command": "new"
+          },
+          {
+            "command": "start"
+          },
+          {
+            "command": "stop"
+          },
+          {
+            "command": "start"
+          },
+          {
+            "command": "state",
+            "expected": "running"
+          }
+        ]
+      },
+      "expected": {}
+    },
+    {
+      "uuid": "626997cb-78d5-4fe8-b501-29fdef804799",
+      "description": "start from stopped state resumes time tracking for current lap",
+      "property": "time",
+      "input": {
+        "commands": [
+          {
+            "command": "new"
+          },
+          {
+            "command": "start"
+          },
+          {
+            "command": "advanceTime",
+            "by": "00:01:20"
+          },
+          {
+            "command": "stop"
+          },
+          {
+            "command": "advanceTime",
+            "by": "00:00:20"
+          },
+          {
+            "command": "start"
+          },
+          {
+            "command": "advanceTime",
+            "by": "00:00:08"
+          },
+          {
+            "command": "currentLap",
+            "expected": "00:01:28"
+          }
+        ]
+      },
+      "expected": {}
+    },
+    {
+      "uuid": "58487c53-ab26-471c-a171-807ef6363319",
+      "description": "start from stopped state resumes time tracking for total",
+      "property": "time",
+      "input": {
+        "commands": [
+          {
+            "command": "new"
+          },
+          {
+            "command": "start"
+          },
+          {
+            "command": "advanceTime",
+            "by": "00:00:23"
+          },
+          {
+            "command": "stop"
+          },
+          {
+            "command": "advanceTime",
+            "by": "00:00:44"
+          },
+          {
+            "command": "start"
+          },
+          {
+            "command": "advanceTime",
+            "by": "00:00:09"
+          },
+          {
+            "command": "total",
+            "expected": "00:00:32"
+          }
+        ]
+      },
+      "expected": {}
+    },
+    {
+      "uuid": "091966e3-ed25-4397-908b-8bb0330118f8",
+      "description": "lap adds current lap to previous laps",
+      "property": "time",
+      "input": {
+        "commands": [
+          {
+            "command": "new"
+          },
+          {
+            "command": "start"
+          },
+          {
+            "command": "advanceTime",
+            "by": "00:01:38"
+          },
+          {
+            "command": "lap"
+          },
+          {
+            "command": "previousLaps",
+            "expected": ["00:01:38"]
+          },
+          {
+            "command": "advanceTime",
+            "by": "00:00:44"
+          },
+          {
+            "command": "lap"
+          },
+          {
+            "command": "previousLaps",
+            "expected": ["00:01:38", "00:00:44"]
+          }
+        ]
+      },
+      "expected": {}
+    },
+    {
+      "uuid": "1aa4c5ee-a7d5-4d59-9679-419deef3c88f",
+      "description": "lap resets current lap and resumes time tracking",
+      "property": "time",
+      "input": {
+        "commands": [
+          {
+            "command": "new"
+          },
+          {
+            "command": "start"
+          },
+          {
+            "command": "advanceTime",
+            "by": "00:08:22"
+          },
+          {
+            "command": "lap"
+          },
+          {
+            "command": "currentLap",
+            "expected": "00:00:00"
+          },
+          {
+            "command": "advanceTime",
+            "by": "00:00:15"
+          },
+          {
+            "command": "currentLap",
+            "expected": "00:00:15"
+          }
+        ]
+      },
+      "expected": {}
+    },
+    {
+      "uuid": "4b46b92e-1b3f-46f6-97d2-0082caf56e80",
+      "description": "lap continues time tracking for total",
+      "property": "time",
+      "input": {
+        "commands": [
+          {
+            "command": "new"
+          },
+          {
+            "command": "start"
+          },
+          {
+            "command": "advanceTime",
+            "by": "00:00:22"
+          },
+          {
+            "command": "lap"
+          },
+          {
+            "command": "advanceTime",
+            "by": "00:00:33"
+          },
+          {
+            "command": "total",
+            "expected": "00:00:55"
+          }
+        ]
+      },
+      "expected": {}
+    },
+    {
+      "uuid": "ea75d36e-63eb-4f34-97ce-8c70e620bdba",
+      "description": "lap cannot be called from ready state",
+      "property": "time",
+      "input": {
+        "commands": [
+          {
+            "command": "new"
+          },
+          {
+            "command": "lap",
+            "expected": {
+              "error": "cannot lap a stopwatch that is not running"
+            }
+          }
+        ]
+      },
+      "expected": {}
+    },
+    {
+      "uuid": "63731154-a23a-412d-a13f-c562f208eb1e",
+      "description": "lap cannot be called from stopped state",
+      "property": "time",
+      "input": {
+        "commands": [
+          {
+            "command": "new"
+          },
+          {
+            "command": "start"
+          },
+          {
+            "command": "stop"
+          },
+          {
+            "command": "lap",
+            "expected": {
+              "error": "cannot lap a stopwatch that is not running"
+            }
+          }
+        ]
+      },
+      "expected": {}
+    },
+    {
+      "uuid": "e585ee15-3b3f-4785-976b-dd96e7cc978b",
+      "description": "stop does not change previous laps",
+      "property": "time",
+      "input": {
+        "commands": [
+          {
+            "command": "new"
+          },
+          {
+            "command": "start"
+          },
+          {
+            "command": "advanceTime",
+            "by": "00:11:22"
+          },
+          {
+            "command": "lap"
+          },
+          {
+            "command": "previousLaps",
+            "expected": ["00:11:22"]
+          },
+          {
+            "command": "stop"
+          },
+          {
+            "command": "previousLaps",
+            "expected": ["00:11:22"]
+          }
+        ]
+      },
+      "expected": {}
+    },
+    {
+      "uuid": "fc3645e2-86cf-4d11-97c6-489f031103f6",
+      "description": "reset from stopped state changes state to ready",
+      "property": "time",
+      "input": {
+        "commands": [
+          {
+            "command": "new"
+          },
+          {
+            "command": "start"
+          },
+          {
+            "command": "stop"
+          },
+          {
+            "command": "reset"
+          },
+          {
+            "command": "state",
+            "expected": "ready"
+          }
+        ]
+      },
+      "expected": {}
+    },
+    {
+      "uuid": "20fbfbf7-68ad-4310-975a-f5f132886c4e",
+      "description": "reset resets current lap",
+      "property": "time",
+      "input": {
+        "commands": [
+          {
+            "command": "new"
+          },
+          {
+            "command": "start"
+          },
+          {
+            "command": "advanceTime",
+            "by": "00:00:10"
+          },
+          {
+            "command": "stop"
+          },
+          {
+            "command": "reset"
+          },
+          {
+            "command": "currentLap",
+            "expected": "00:00:00"
+          }
+        ]
+      },
+      "expected": {}
+    },
+    {
+      "uuid": "00a8f7bb-dd5c-43e5-8705-3ef124007662",
+      "description": "reset clears previous laps",
+      "property": "time",
+      "input": {
+        "commands": [
+          {
+            "command": "new"
+          },
+          {
+            "command": "start"
+          },
+          {
+            "command": "advanceTime",
+            "by": "00:00:10"
+          },
+          {
+            "command": "lap"
+          },
+          {
+            "command": "advanceTime",
+            "by": "00:00:20"
+          },
+          {
+            "command": "lap"
+          },
+          {
+            "command": "previousLaps",
+            "expected": ["00:00:10", "00:00:20"]
+          },
+          {
+            "command": "stop"
+          },
+          {
+            "command": "reset"
+          },
+          {
+            "command": "previousLaps",
+            "expected": []
+          }
+        ]
+      },
+      "expected": {}
+    },
+    {
+      "uuid": "76cea936-6214-4e95-b6d1-4d4edcf90499",
+      "description": "reset cannot be called from ready state",
+      "property": "time",
+      "input": {
+        "commands": [
+          {
+            "command": "new"
+          },
+          {
+            "command": "reset",
+            "expected": {
+              "error": "cannot reset a stopwatch that is not stopped"
+            }
+          }
+        ]
+      },
+      "expected": {}
+    },
+    {
+      "uuid": "ba4d8e69-f200-4721-b59e-90d8cf615153",
+      "description": "reset cannot be called from running state",
+      "property": "time",
+      "input": {
+        "commands": [
+          {
+            "command": "new"
+          },
+          {
+            "command": "start"
+          },
+          {
+            "command": "reset",
+            "expected": {
+              "error": "cannot reset a stopwatch that is not stopped"
+            }
+          }
+        ]
+      },
+      "expected": {}
+    },
+    {
+      "uuid": "0b01751a-cb57-493f-bb86-409de6e84306",
+      "description": "supports very long laps",
+      "property": "time",
+      "input": {
+        "commands": [
+          {
+            "command": "new"
+          },
+          {
+            "command": "start"
+          },
+          {
+            "command": "advanceTime",
+            "by": "01:23:45"
+          },
+          {
+            "command": "currentLap",
+            "expected": "01:23:45"
+          },
+          {
+            "command": "lap"
+          },
+          {
+            "command": "previousLaps",
+            "expected": ["01:23:45"]
+          },
+          {
+            "command": "advanceTime",
+            "by": "04:01:40"
+          },
+          {
+            "command": "currentLap",
+            "expected": "04:01:40"
+          },
+          {
+            "command": "total",
+            "expected": "05:25:25"
+          },
+          {
+            "command": "lap"
+          },
+          {
+            "command": "previousLaps",
+            "expected": ["01:23:45", "04:01:40"]
+          },
+          {
+            "command": "advanceTime",
+            "by": "08:43:05"
+          },
+          {
+            "command": "currentLap",
+            "expected": "08:43:05"
+          },
+          {
+            "command": "total",
+            "expected": "14:08:30"
+          },
+          {
+            "command": "lap"
+          },
+          {
+            "command": "previousLaps",
+            "expected": ["01:23:45", "04:01:40", "08:43:05"]
+          }
+        ]
+      },
+      "expected": {}
+    }
+  ]
+}
diff --git a/exercises/split-second-stopwatch/instructions.md b/exercises/split-second-stopwatch/instructions.md
new file mode 100644
index 000000000..30bdc988d
--- /dev/null
+++ b/exercises/split-second-stopwatch/instructions.md
@@ -0,0 +1,22 @@
+# Instructions
+
+Your task is to build a stopwatch to keep precise track of lap times.
+
+The stopwatch uses four commands (start, stop, lap, and reset) to keep track of:
+
+1. The current lap's tracked time
+2. Previously recorded lap times
+
+What commands can be used depends on which state the stopwatch is in:
+
+1. Ready: initial state
+2. Running: tracking time
+3. Stopped: not tracking time
+
+| Command | Begin state | End state | Effect                                                   |
+| ------- | ----------- | --------- | -------------------------------------------------------- |
+| Start   | Ready       | Running   | Start tracking time                                      |
+| Start   | Stopped     | Running   | Resume tracking time                                     |
+| Stop    | Running     | Stopped   | Stop tracking time                                       |
+| Lap     | Running     | Running   | Add current lap to previous laps, then reset current lap |
+| Reset   | Stopped     | Ready     | Reset current lap and clear previous laps                |
diff --git a/exercises/split-second-stopwatch/introduction.md b/exercises/split-second-stopwatch/introduction.md
new file mode 100644
index 000000000..a84322477
--- /dev/null
+++ b/exercises/split-second-stopwatch/introduction.md
@@ -0,0 +1,6 @@
+# Introduction
+
+You've always run for the thrill of it — no schedules, no timers, just the sound of your feet on the pavement.
+But now that you've joined a competitive running crew, things are getting serious.
+Training sessions are timed to the second, and every split second counts.
+To keep pace, you've picked up the _Split-Second Stopwatch_ — a sleek, high-tech gadget that's about to become your new best friend.
diff --git a/exercises/split-second-stopwatch/metadata.toml b/exercises/split-second-stopwatch/metadata.toml
new file mode 100644
index 000000000..1116f03ee
--- /dev/null
+++ b/exercises/split-second-stopwatch/metadata.toml
@@ -0,0 +1,4 @@
+title = "Split-Second Stopwatch"
+blurb = "Keep track of time through a digital stopwatch."
+source = "Erik Schierboom"
+source_url = "https://github.com/exercism/problem-specifications/pull/2547"