Each door shows one real event in the December 2026 sky, like the Geminid meteors, the earliest sunset of the year or the solstice, plus your own sunset time if you'd like it.
December has the year's earliest sunsets (around December 5 to 10 at mid-northern latitudes), the Geminid meteor shower on the night of December 13 to 14 with only a thin crescent Moon, the winter solstice on December 21 at 20:50 UTC, and a full Cold Moon on the evening of December 23 in the Americas. Venus is the morning star all month. Moon times and the solstice were calculated for 2026, and the Geminid and planet notes are for the Northern Hemisphere.
Your location is only used in your browser to work out your sunset time, and it's never sent anywhere.
Asterfold shows where the Sun will set from the exact spot you watch, when golden hour and blue hour fall, and keeps a record of what the sky actually did.
Free on the App StoreTap Daily 8 am reminder above. Your iPhone, Mac, Google or Outlook calendar adds 24 short events, one per door, each with a link straight back here. Remove them any time like any other calendar event.