| 100% | TET | 3 | __ Nguyen Dan (literally, "first day festival") |
| 56% | TET | 3 | ___ Nguyen Dan (annual Vietnamese festival) |
| 43% | TETS | 4 | ''Festivals of the first day'' |
| 41% | PAGAN | 5 | Like the Beltane May Day festival |
| 41% | ASHWEDNESDAY | 12 | First day of Lent |
| 40% | TEQUILASUNRISE | 14 | First showing at an all-day film festival? (1988) |
| 40% | STARTDATE | 9 | First day on the job |
| 40% | WEDNESDAY | 9 | First day of Lent: Ash __ |
| 40% | MONDAY | 6 | First day back at work? |
| 39% | TET | 3 | ___ Nguyen Dan (celebration of spring) |
| 39% | TET | 3 | First day of spring, to Vietnamese |
| 39% | MONDAY | 6 | First day of the work week |
| 39% | MON | 3 | First day after the weekend: Abbr. |
| 39% | MON | 3 | First day of most workweeks: Abbr. |
| 39% | TET | 3 | First day of spring, in Hanoi |
| 38% | MON | 3 | First day of the work week: Abbr. |
| 38% | MON | 3 | First day of the workweek, typically (abbr.) |
| 38% | MON | 3 | First day of the workweek, typically: Abbr. |
| 38% | SAT | 3 | First day in a weekend, for short |
| 38% | SAT | 3 | First day of the weekend, for short |
| 38% | STARTDATE | 9 | First day on the job, for example |
| 38% | WEDNESDAY | 9 | Ash __, first day of Lent |
| 38% | ASH | 3 | ___ Wednesday, first day of Lent |
| 38% | IMNEW | 5 | "This is my first day" |
| 37% | CALENDS | 7 | First day of the month, in ancient Rome |
| 37% | BUTWHYCANTIWEARIT | 17 | ...on the first day of school |
| 37% | ASH | 3 | ___ Wednesday (the first day of Lent) |
| 37% | LEASED | 6 | Hired new easel on first day |
| 37% | DAWN | 4 | First light of day |
| 37% | ONEAM | 5 | Day's first stroke |