Repeat each cycle
Every person's D, E, N and O sequence is projected from their own cycle-start date.
Shared-time finder for rotating schedules
Find the hours your shifts leave together.
Enter two to four repeating work cycles. Overlap Days combines the schedules, extends night shifts by a recovery period, and highlights the next full day, evening or useful block of time everyone shares.
No accountBrowser-only calculationShareable setup linkCSV & calendar export
Planner
Compare repeating shift cycles.
Use D for day, E for evening, N for night and O for off. The cycle repeats from each person's chosen anchor date.
Schedules
2–4 peopleScope: repeating work patterns only. Public holidays, annual leave, overtime, swaps and one-off changes are not added automatically.
Results
Local timeYour shared-time calendar will appear here.
What the result means
Not every day off is usable time.
A night shift that ends in the morning may still consume much of that day. The recovery setting lets the planner reserve sleep or decompression time after each N shift.
Combine busy intervals
Work and configured night-recovery intervals are merged into a shared unavailable timeline.
Show common gaps
The remaining gaps become full days, shared evenings, daytime windows and total shared hours.
Common questions
Before you rely on a result.
The tool is a planning aid. Confirm real rosters before booking travel, childcare or paid events.
Why are public holidays not included?
Holiday rules vary by country, region, employer and contract. Version 1 deliberately avoids a maintained holiday database. Treat holidays and leave as manual real-world checks.
Does a night shift make the next day busy?
The shift itself crosses midnight when its end time is earlier than its start time. The configured recovery hours then extend the unavailable period beyond the shift end.
What counts as a shared evening?
The summary requires at least four common free hours between 6 PM and midnight. The calendar still displays total common hours even when that threshold is not met.
Where are schedules stored?
The current setup is stored in local browser storage for convenience. A share link places the same settings in the URL fragment, which is not sent to the web server as part of the page request.