Obj. ID: 39518
Jewish printed books  Birkat ha-Chama, be-Yom Revi'i KafGimmel Nissan Tashyg, Isru Chag shel Pesach, Casablanca, 1954

This text was prepared by William Gross:

A relatively rare publication for the infrequently-used blessing for the sun, a blessing recited on the ocassion of the completion of the cycle of the sun, which occurs only once every 28 years.
Birkat Hachama (ברכת החמה, "Blessing of the Sun") refers to a rare Jewish blessing that is recited to the Creator, thanking Him for creating the sun. The blessing is recited when the sun completes its cycle every 28 years on a Tuesday at sundown. Jewish tradition says that when the Sun completes this cycle, it has returned to the position it occupied when the world was created. Because the blessing needs to be said when the sun is visible, the blessing is postponed to the following day, on Wednesday morning.
According to Judaism, the Sun has a 28-year solar cycle known as machzor gadol (מחזור גדול, "the great cycle"). A solar year is estimated as 365.25 days and the "Blessing of the Sun", being said at the beginning of this cycle, is therefore recited every 10,227 (28 times 365.25) days. The last time that it was recited was on April 8, 2009 (14 Nisan 5769 on the Hebrew calendar.
From an astronomic point of view, there is nothing special to these dates; e.g. the sun, moon, planets and stars will not be aligned in any specific pattern.