I'm 100% sure I saw a calendar that was 7 columns as days, 52 rows as weeks, every day was just a number, no borders or anything, months were separated with a l

I'm 100% sure I saw a calendar that was 7 columns as days, 52 rows as weeks, every day was just a number, no borders or anything, months were separated with a line and every first day of month was with a shade/gradient. It was only on the left third/quarter of a vertical paper so the right part was left for notes.