Render a month-at-a-glance calendar grid — YYYY-MM input. Part of the DevTools Surf developer suite. Browse more tools in the Date / Time collection.
Use Cases
Project managers visualizing sprint timelines month by month
Developers checking what day of the week a release date falls on
HR teams planning shift schedules around weekday patterns
Teachers generating printable monthly calendar grids for classes
Tips
Enter a YYYY-MM value to render any month grid instantly
Use the grid to plan sprint schedules and deadlines visually
Navigate between months to compare weekday distributions
Fun Facts
The 7-day week has no astronomical basis — it was adopted from the Babylonian calendar around 600 BCE and spread through Roman and later Christian traditions.
The ISO 8601 standard defines Monday as day 1 of the week, while the U.S. convention starts weeks on Sunday — a difference that causes endless localization bugs.
February 2026 is notable because it starts on a Sunday and ends on a Saturday, filling the calendar grid perfectly with no wasted rows — this happens roughly every 11 years.
FAQ
What does it render?
A month-at-a-glance calendar grid with dates. Input YYYY-MM; output is the 5-6-week grid for that month.
Starts Monday or Sunday?
Configurable — Monday (ISO standard, most of the world) or Sunday (US default). Affects the grid column arrangement.
Includes previous/next month dates?
Yes — the grid shows 5-6 complete weeks, with gray-out dates from adjacent months filling the corners.
Holidays?
Not in this tool. For holiday-highlighted calendars use a regional calendar tool (calendar.me, timeanddate.com).
