BROWSER-ONLY DATE TOOL · Date, Time & Scheduling
Biweekly Rotation Calendar
Expand alternating A and B weeks from a stated seven-day anchor.
If week A begins Monday 6 January 2025, week B starts Monday 13 January.
Set up your dates
Enter the values for this task. The example shows the expected input format.
Your result
Weeks shown
UNDERSTAND THE RESULT
How to use the Biweekly Rotation Calendar
Use this to sketch an A/B schedule for staffing, classes, or routines that alternate every seven days. The anchor controls the boundary of each block, even when it is not Monday.
What to enter
Enter the first day of week A and the number of weeks to list. A week here means a seven-day block beginning on your anchor, not necessarily a Monday-to-Sunday calendar week.
Worked example
If week A begins Monday 6 January 2025, week B starts Monday 13 January.
How to read the result
Each row shows the block start, inclusive end, and A or B label. The following row starts the next day and switches label, making the rotation easy to audit.
How the result is worked out
The anchor begins week A. Each seven-day block ends six days later, and the next block alternates A and B.
What to check
The anchor need not be Monday. Shift details, holidays, swaps, and local agreements are not inferred.
A common mistake to avoid
The labels do not specify shifts, hours, assignments, or exceptions. Agree those details separately before using the list as a staff rota.
This tool calculates in your browser. The dates you enter are not sent to the Nirmion API.
Questions to check
Can a cycle start on another weekday?
Yes. The entered anchor starts a seven-day block regardless of weekday.
Does week A repeat every 14 days?
Yes. The model alternates seven-day A and B blocks, so the same label returns after two blocks.
Are holidays or swaps shown?
No. The table is a base pattern; enter those changes in a separate roster or calendar.