Days of the Omer 280 - 7 weeks from the second night of Pesach to the day before Shavuot

Days of the Omer 280 / סְפִירַת הָעוֹמֶר 4040

Warning! Results for year 1752 C.E. and earlier may be inaccurate.
Hebcal does not take into account a correction of ten days that was introduced by Pope Gregory XIII known as the Gregorian Reformation. ^[1]

7 weeks from the second night of Pesach to the day before Shavuot ㊾

Days of the Omer for Hebrew Year 4040 began on Saturday, 3 April 0280 and ended on Saturday, 22 May 0280.

Counting of the Omer (or Sefirat Ha’omer, Hebrew: ספירת העומר) is a verbal counting of each of the forty-nine days between the Jewish holidays of Passover and Shavuot. This mitzvah derives from the Torah commandment to count forty-nine days beginning from the day on which the Omer, a sacrifice containing an omer-measure of barley, was offered in the Temple in Jerusalem, up until the day before an offering of wheat was brought to the Temple on Shavuot. The Counting of the Omer begins on the second day of Passover (the 16th of Nisan) for Rabbinic Jews, and after the weekly Shabbat during Passover for Karaite Jews, and ends the day before the holiday of Shavuot, the ‘fiftieth day.’.

Read more from Judaism 101 or Wikipedia

Dates for Days of the Omer

Holiday	Starts	Ends	Hebrew Dates
Days of the Omer 277	ThursdayThu, April 5Apr 5	ThursdayThu, May 24May 24	16 Nisan - 5 Sivan 4037
Days of the Omer 278	TuesdayTue, March 26Mar 26	TuesdayTue, May 14May 14	16 Nisan - 5 Sivan 4038
Days of the Omer 279	TuesdayTue, April 15Apr 15	TuesdayTue, June 3Jun 3	16 Nisan - 5 Sivan 4039
Days of the Omer 280	SaturdaySat, April 3Apr 3	SaturdaySat, May 22May 22	16 Nisan - 5 Sivan 4040
Days of the Omer 281	TuesdayTue, March 22Mar 22	TuesdayTue, May 10May 10	16 Nisan - 5 Sivan 4041
Days of the Omer 282	TuesdayTue, April 11Apr 11	TuesdayTue, May 30May 30	16 Nisan - 5 Sivan 4042
Days of the Omer 283	SaturdaySat, March 31Mar 31	SaturdaySat, May 19May 19	16 Nisan - 5 Sivan 4043
Days of the Omer 284	ThursdayThu, March 20Mar 20	ThursdayThu, May 8May 8	16 Nisan - 5 Sivan 4044
Days of the Omer 285	TuesdayTue, April 7Apr 7	TuesdayTue, May 26May 26	16 Nisan - 5 Sivan 4045
Days of the Omer 286	SaturdaySat, March 27Mar 27	SaturdaySat, May 15May 15	16 Nisan - 5 Sivan 4046
Days of the Omer 287	SaturdaySat, April 16Apr 16	SaturdaySat, June 4Jun 4	16 Nisan - 5 Sivan 4047