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T H E C E N T E N N I A L
A celebration of the number one hundred
Today is day 121 of 2026.
It has been 21 days since day 100.
100 is the first three-digit number. It's the square of 10, the basis of our decimal system. It represents completeness, totality, perfection. When we give "100%," we give everything we have.
Each cell represents one day. ★ marks today (or the first 100).
Use the buttons above to explore 100 facts, 100 small pleasures, the history and mathematics of 100, and how 100 appears around the world.
One hundred:
ten tens,
four quarters of a quarter of four hundred,
the square root of ten thousand,
enough to feel like a lot
but still small enough to count.