Birthday facts
Born on April 13.
Everyone born on April 13 is a Aries — ruled by Mars, first, loudest, already gone. The stone is diamond, the flower daisy, and the day is shared with Christopher Hitchens and Thomas Jefferson.
Your book
Born on April 13? Add the year.
Then it is a pop-up book: the sky the day you arrived, the No. 1 that week, the president, what a stamp cost, your life in weeks, and who was exactly your age when they did the thing they are known for — and at the end, a birthday poster of the day, engraved, to take home. One field. The date lives after the # in the link, which no server sees — nothing about you leaves your browser.
Making it for someone else? Send it as a pop-up birthday card.
The old books say
Aries, March 21 to April 19.
The first sign, and the tradition treats it that way: the Ram is the one who goes first — through the door, into the argument, off the cliff. Ruled by Mars, a fire sign, and the books credit it with courage, impatience and a short memory for grudges, which is a generous way of saying it has already moved on. Its people are supposed to start things. Finishing them is what the other eleven are for.
Astrology, reported rather than endorsed — the astronomy is the part of the book that is real.
Good company
Also born on April 13.
The names most looked up among everyone who shares the day — leaning on the ones who last.
On this day
What April 13 has seen.
It is Yom HaShoah in Israel.
The calendar
When April 13 falls.
A Monday in 2026, a Tuesday in 2027, a Thursday in 2028, a Friday in 2029, and a Saturday in 2030.