With this simple online calculator you will be able to convert a Gregorian Calendar Date to a Hebrew Calendar Date.
For Example, if you enter in 23/02/2007 it will convert to 5 Adar l 5767.
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Jul. 25th - 26th
23rd Tammuz
Begins: 20:45
Ends: 21:56
Sedra: Mattoth (mevorachim Hachodeah)