| TRANS | Like those celebrated with an annual Day of Visibility on March 31 |
| LILAC | Flower celebrated with an annual festival on Mackinac Island |
| PINK | T-shirt colour associated with an annual day against bullying |
| TISHABAV | Traditional annual day of Jewish mourning (Hebrew) (5,1'2) |
| FRANCE | Britain and ... signed a pledge on March 31, 1939, to defend Poland against German aggression |
| NERDS | Those celebrated on the podcast "Fantastic Geeks (and Where to Find Them)" |
| NYE | Abbreviation for the big party night before New Year's Day - celebrated with an Auld Lang Syne singalong and Big Ben's famous midnight "bong" (1,1,1) |
| HONOURED | Celebrated, ... with an award |
| EQUINOX | Either of two annual days, around March 20 and September 23 (7) |
| FOUREYES | Wearer of glasses that's in possession of 'visibility', did you say? (4-4) |
| INFRARED | Popular fellow seldom having day out of visibility? |
| YEARLY | Annual Day finally on first (6) |
| TARANAKI | Province whose anniversary day is March 31 (8) |
| TACO | Dia del ___ (March 31 celebration of a popular Mexican food) |
| EGG | Default profile picture on Twitter from 2010 to March 31, 2017 |
| FOGS | Cloudy morning phenomena that could reduce visibility on the road |
| SEAMIST | It cuts down visibility on the main routes (3,4) |
| ADOPTIVERSARIES | Annual days to celebrate a pet's Gotcha Day |
| WHITEOUT | Dense snow blizzard causing loss of visibility (8) |
| MIST | Tim's lost in lack of visibility (4) |
