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Baby Birthday Facts

Pick a date to see its moon phase, zodiac sign, Chinese zodiac, birthstone and famous people born that day.

Birth Day

The sky and calendar on your due date

Pick a date and the card appears right away. If you're signed in, the date from your profile fills in.

The day your baby is born becomes a story you'll tell for years. The birthday facts card describes the date you pick through the sky and the calendar: the day of the week, the moon phase that night, the Western zodiac sign, the animal in the Chinese zodiac, and that month's birthstone and flower. Everything is calculated from the date, nothing is made up.

If your baby isn't here yet, you get a card for the due date and see how many days are left. Most babies arrive a few days before or after the due date, so you can make the card again with the real date after the birth. The list of famous people born the same day is a fun conversation starter too.

What you can do

  • See which day of the week the date falls on.
  • Find the moon phase, Western zodiac sign and Chinese zodiac for that day.
  • Discover the birthstone and birth flower of the month.
  • See famous people born the same day and share the card with your family.

How to use it

  1. Pick your baby's birth date or due date.
  2. The card appears right away. Look at the moon phase, sign and birthstone.
  3. Share it if you like it, and make it again with the real date after the birth.

Frequently asked questions

How is the moon phase worked out?

The moon phase is calculated from the days since a known new moon, divided by the average lunar cycle of about 29.5 days. The result is rounded to one of eight phases: new moon, waxing crescent, first quarter, waxing gibbous, full moon, waning gibbous, last quarter and waning crescent.

Which year decides the Chinese zodiac?

The Chinese zodiac follows the lunar calendar, and the new year starts between late January and mid-February. So babies born in January or February may have the previous year's animal. The card takes this into account.

What are birthstones and birth flowers?

Each month is traditionally paired with a stone and a flower, for example garnet and carnation for January. These pairings vary a little between cultures; the card uses the most common list.

Is the birthday card right if I use my due date?

The card is right for the date you pick, but only a small share of babies are born exactly on their due date. After the birth you can pick the real date and make the card again.

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