Sync your clock to the lunar cycle.
Setting your clock?
Use the tool below to find the next High Tide, then align your clock hand to the 'High Tide' position.
Read our full Setup Guide →
Look up any High Tide time for your location today (even if it has passed) and enter it here.
Align the clock hand to HIGH TIDE (12 o'clock).
Insert the battery at exactly:
TODAY
Why this time?
We have calculated the next 12h 25m cycle based on your input. This perfectly syncs the mechanism to the lunar day.
For "Pro Accuracy", check your clock on these upcoming dates: