| CALENDS | First day of a Roman month |
| CALENDAR | Word for a book of accounts due on the first day of a Roman month originally, later an almanac, chart, diary or other system of divisions of the year (8) |
| IDES | Full-moon day of a Roman month (4) |
| NONES | Time of a Roman month |
| MAY | Name for hawthorn; its blossom, traditionally gathered to celebrate the first day of a month named after a fertility goddess of springtime; or, one's bloom, early life, flush or prime (3) |
| ROSH | ___ Chodesh (first day of a Jewish month) |
| APRILFOOL | One tricked on the first day of a spring month! (5,4) |
| ROSHCHODESH | In Judaism, the first day of a new month, coinciding with the new moon (4,7) |
| RABBITS | Immortalised in Richard Adams' story Watership Down, herbivorous animals such as cottontails whose mention on the first day of a month is said to invoke good luck (7) |
| CUSP | First day of a sign in the zodiac |
| OCTI | First day of a fall mo.? |
| FRIDAY | If this day of week falls on the 13th day of a month, it is considered to be particularly unlucky |
| YEAREND | Last day of a twelve month period (4-3) |
| MON | Last day of a three-day weekend: Abbr. |
| SAT | First full day of a standard weekend: Abbr. |
| MAYDAY | Distress call for one day of a month (6) |
| UTAS | Lost eight days of a festival, with half a day up |
| WEATHERREPORT | Thing to check the day of a parade |
| REDLETTER | Day of a left-wing landlord? (3-6) |
| THU | Opening day of a golf major: Abbr. |
