EQUINOX

When the sun is directly above the equator (7)

Solution has appeared in 2 crosswords (1 across and 1 down):

• Quick crossword No 15,844 — 2021-02-17 00:00:04
  13D: Annual moments when day and night both last about 12 hours everywhere (7)
• Quick crossword No 15,714 — 2020-09-16 23:00:40
  21A: When the sun is directly above the equator (7)