The Book of Threes

Birkat Hachama (Blessing on the Sun)

Why does Birkat Hachama take place only every 28 years?

The starting point is Tuesday at 6:00 pm. Now, since a year lasts 365 1/4 days – or 52 weeks plus a remainder of 1 1/4 days – it follows that after one year, the Sun will return to the spring equinox, but will fall 1 1/4 days later in the week: Wednesday at midnight. After two years, the Sun will return to the spring equinox, but it will now be 2 x 1 1/4 days later in the week: Thursday at 6:00 am. Only after 28 years, will the Sun return to the spring equinox on Tuesday at 6:00 pm.

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Three is the Magic Number

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