Birthstone of December
- Tanzanite — blue-violet, found in only one place: Tanzania
- Zircon — one of the oldest minerals on Earth
- Turquoise — opaque sky-blue stone, prized for millennia
December is one of the months with 3 official birthstones — pick the one you like.
Where this day sits
- Day 18 of 30 in Sagittarius
- Day 343 of the year (day 344 in a leap year)
- Western month flower: Narcissus
Day-by-day birth flowers come from Japan's tanjōbana (誕生花) calendar, which gives each date its own flowers. Lists vary between sources; we follow one published 366-day table and show up to three flowers per day. Meanings are the traditional hanakotoba, in our own words. Birthstones follow the modern list used by U.S. jewelers (Jewelers of America and the American Gem Trade Association).