Fit to page is why your printable came out wrong
Print calendars at 100% — the option named "Actual size", never "Fit to page". That's the rule. It matters because Fit to page doesn't just handle mismatched paper: it rescales every page, even when the file and the paper are the same size, and a calendar is exactly the kind of layout that shows it.
What Fit to page actually does
Adobe's own description of the Fit option in Acrobat is blunt: it will "scale small pages up and large pages down to fit the paper" (Acrobat's scaling documentation). The detail people miss is the target. The printer can't lay ink on the entire sheet — there's an unprintable strip along the edges — so fitting means fitting into that smaller area. Acrobat's preset for this behavior is literally named "Shrink To Printable Area."
So an A4 file printed on A4 paper with Fit switched on still gets shrunk a few percent and re-centered. Nothing warned you, and on a letter or an essay nobody would ever notice.
A calendar notices
A calendar page is mostly grid, and grids amplify small errors:
- Margins drift. The layout was drawn with deliberate margins; scaling shrinks the content and pads the edges with accidental whitespace.
- Hairlines go soft. Thin rules are resampled when the page is scaled, and crisp becomes fuzzy. On decent paper the difference between 100% and fitted is visible from across the desk.
- Mismatches get hidden instead of fixed. Fit will happily blow an A5 file up to A4 — a 141% enlargement, since A5 is exactly half of A4 — or squeeze A4 onto Letter at roughly 94%. The print "works," so the wrong file goes unnoticed. Matching the file to the paper is the actual fix.
The 100% routine
Three steps, every print dialog:
- Check the paper in the tray, and download the file that matches it.
- Find the scaling control and choose "Actual size" — or set the scale field to 100. In Acrobat this is under Page Sizing & Handling; Custom Scale at 100% does the same job.
- Print one page and look at the margins before printing twelve.
Step three sounds fussy and saves the most paper. If the margins are even and the grid reaches where the preview said it would, the other eleven months are safe.
When Fit to page is the right call
Two honest cases. If the PDF is genuinely bigger than any paper you own — architectural plans, a poster layout — shrinking is the point, and Acrobat's "Shrink oversized pages" exists exactly for that. And if you only have the wrong paper today, a fitted print beats no print; just know the geometry drifted and reprint properly later.
For everything else, the scaling is silent damage to a layout someone drew at a specific size.
Files that expect to be printed at 100%
Every calendar we make is drawn separately for A4, A5, and Letter — no master file scaled three ways, so printing at 100% gives you the margins and line weights as designed. Pick the size that matches your tray from any year and language, set Actual size once, and the grid comes out exactly as drawn. $19 once, every size included.