The crossword solutions for the term CALENDAR COLUMN: ABBR. are THUR (4 letters), TUES (4 letters), MON (3 letters), TUE (3 letters), and THU (3 letters). These abbreviations refer to the days of the week, with THUR being Thursday, TUES being Tuesday, MON being Monday, TUE being Tuesday, and THU being Thursday. These abbreviations are commonly used in calendars to denote the days of the week.