Who's looking up
Type it the way you'd say it in the group chat, or edit the list.
When the Moon is up for each of you
Next 72 hours. Pale bars: the Moon is up. Gold: up for everyone while you're all awake. Dotted: up for everyone, but someone's asleep. Click to move the map.
The moonlit half of Earth
The glow is everywhere the Moon is above the horizon; the shadow is night. Watch it slide west as Earth turns.
What everyone gets at that moment
Same Moon posts this in the family's iMessage group, each line in that person's language.
The postcard afterwards
Add the two photos from the moment. Until then you'll see the Moon exactly as each of you would see it, upside down if you're south of the equator.