Create printable monthly and yearly calendars with custom start days, holidays, and photo slots.
A printable calendar is a grid problem before it is a design problem: every date's position is fixed by the year, the month, and the day you choose to start the week. This tool turns those choices into a print-ready page - a single month or a 12-month year view - and lets you mark holidays and reserve photo slots on it. What surprises people: the grid is not a property of the month alone. Where the 1st falls decides how many rows the month spans, and the first and last rows always reach into the neighboring months.
A concrete input and expected output from the current implementation.
Input
Year 2026, month December, week starts Monday, holiday: Christmas Day on Dec 25, photo slots: 1
Expected output
A print-ready page with a Monday-first grid of 5 rows. December 1 lands in the Tuesday column, so the week rows span November 30, 2026 to January 3, 2027; the month's dates fill rows 1-5 (Dec 1-6, 7-13, 14-20, 21-27, 28-31). December 25, a Friday, is marked as the holiday in row 4, and the photo slot appears on the page. December 31 is a Thursday.
December 1, 2026 is a Tuesday because the year-to-date count of 334 days leaves a remainder of 5 past January 1 (a Thursday), and the 31-day month then ends on Thursday the 31st. With Monday-start weeks, the grid must open on November 30 and close on January 3 to keep every row a full week.
Dates are placed by computation, not by typing them in. For the chosen year and month the tool works out the day count (28 to 31, with leap years for February) and the weekday of the 1st, then assigns each date a column for its weekday and a row for its week, from your selected start day. The 1st's weekday decides whether the month needs five rows or six.
The month grid, holiday markers, and photo slots are composed into one page meant for paper. Holidays are dates you enter, matched against the grid and marked; photo slots are rectangular areas you place on the page to fill with your own images. The page prints through the browser's print dialog, so final paper size, orientation, and scale come from the print settings you choose.
Because a grid row must be a whole week. With Monday in the first column, December 1 (a Tuesday) forces the top row to start on November 30, and the 31-day month ends on a Thursday, so the bottom row extends to January 3, 2027. The design is correct; those corner dates simply belong to other months.
No - the tool produces static, printable pages: date grids, marked holidays, and photo slots. There is no event list, notification, or sync, and the finished page is a printout you take elsewhere. Images you add for photo slots are handled in the browser and are not uploaded anywhere.
The example and behavioral notes were checked against the browser implementation. Standards and primary references below define the relevant format, formula, or platform behavior.
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