Birthstone of October
- Opal — flashes every color as you turn it
- Tourmaline — comes in every color, even pink and green in one stone
October is one of the months with 2 official birthstones — pick the one you like.
Where this day sits
- Day 15 of 30 in Libra
- Day 280 of the year (day 281 in a leap year)
- Western month flower: Marigold
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).