Printable calendar: generate a blank monthly calendar as a free PDF you can print, for any month and year you need. No signup, runs in your browser tab.
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● Today■ Holiday◐ Moon phaseW# = week number
Date and time results depend on your browser time-zone data and selected inputs. Time-zone laws can change; verify critical schedules with participants.
Calendar grids are computed locally in your browser (deterministic ISO algorithm). Holidays are US federal holidays plus common observances; moon phases are simplified. No account, no tracking — your dates never leave this device.
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Printable calendar: generate a blank monthly calendar as a free PDF you can print, for any month and year you need. No signup, runs in your browser tab.
September 2026 fills 32 of the fixed 42 grid cells.
What is a printable calendar and how does it work?
A printable calendar is a free browser-based tool that lets you generate and print monthly or yearly calendars directly from your device. No downloads or software installation required , just select your month and print.
Do I need to create an account or sign up to use this printable calendar?
No. This printable calendar is completely no-signup. Everything runs in your browser, so you can generate and print calendars instantly without providing any personal information or creating an account.
Can I customize the printable calendar before printing?
Yes. You can choose any month or year, and the printable calendar adjusts accordingly. You can also select your preferred layout and print it straight from your browser with your local printer settings.
BoringToolsKit. “Printable Calendar.” boringtoolskit.com/printable-calendar/. Free to reference in articles, syllabi, and answer posts with a link.
Privacy: Inputs and results stay in this browser. Any future sponsored recommendation or advertisement will be clearly labeled and kept separate from the calculation.
Worked example: September 2026, week starting Sunday
Take year 2026, month 9, week start Sunday. The model first asks three questions of the date engine: what weekday is the 1st, how long is the month, and how many leading cells does that force? September 1, 2026 falls on a Tuesday (weekday index 2) and the month has 30 days. With Sunday as column 0, the leading offset is (2 - 0 + 7) mod 7 = 2, so the grid opens on Sunday, August 30, 2026 and Monday, August 31, 2026, both rendered with the calendar-outside class and no aria-current attribute.
Filling forward: 2 leading cells plus 30 in-month days occupy cells 1 through 32 of the 42-cell grid, so the last 10 cells are October 1 through October 10. Because the loop always emits exactly 6 rows of 7, September 2026 shows 10 trailing October days even though a 5-row grid would almost fit (32 cells needs a 5th row of 4 days). Compare February 2026: it starts on a Sunday and has 28 days, so the offset is 0 and all 28 days land in the first 4 rows, leaving 14 outside cells. Same function, offsets 0 and 2, different waste.
The today flag is a UTC string comparison. If you view the page on September 22, 2026, the cell holding 22 matches todayIso '2026-09-22' exactly and gets aria-current="date"; the neighboring 21 and 23 fail the equality and stay unmarked. One character of difference, like a timezone shifting the local date to the 21st, silently unmarks the row.
Limits the six-row grid quietly accepts
The 6-row constant trades efficiency for predictability, and the cost is concrete. A 31-day month starting on the last weekday of the week spans 37 cells, so 5 rows of 7 would suffice; the 6-row grid always prints 42. Across a printed year of 12 months that is at most 60 blank or borrowed cells, roughly 10 extra table rows of ink and paper per annual print run.
Everything is computed in UTC, which is deliberate for a printable artifact but worth understanding. The month name comes from Intl.DateTimeFormat with timeZone:'UTC', and todayIso is built from Date.UTC on the viewer's local calendar date, so 'today' highlighting is correct for the user's own date but the grid itself never shifts. A user in UTC+14 printing at 11 pm on the 1st sees the 1st marked; a user in UTC-11 printing at 6 am the next local day sees their date marked correctly too, because the input is local and only the arithmetic is UTC.
Validation is strict but narrow: year must be an integer from 1 to 9999 and month from 1 to 12, otherwise you get the invalid-calendar message. Year 1 is valid, so historical proleptic Gregorian output is possible, but there is no Julian calendar switch and no week numbers. The weekStart toggle only reorders columns; a Monday-start September 2026 grid puts the offset at (2 - 1 + 7) mod 7 = 1, still opening on August 31, and the row count never changes.
