TL;DR

The Counting of the Omer (Sefirat HaOmer) is the commandment to count the 49 days between Passover (the second day of Passover) and Shavuot. The count is performed every evening after the Maariv (evening) prayer, with a blessing. A GoMixApp digital signage system counts automatically every evening and displays the count in both versions – Ashkenazi and Sephardic (Edot HaMizrach).

The Counting of the Omer is a unique Torah commandment – one additional day is counted each evening, from the start of Passover until Shavuot. In this article we review the mitzvah, the different versions, Lag BaOmer and the mourning customs, and how the count can be displayed automatically on digital signage in the synagogue.

What is the Counting of the Omer?

The Counting of the Omer is a positive Torah commandment – the verse states: “And you shall count for yourselves from the morrow of the Sabbath… seven complete weeks shall there be. Until the morrow of the seventh Sabbath you shall count fifty days” (Leviticus 23:15-16). It begins on the evening of the second day of Passover (16th of Nisan) and continues for 49 days, with the 50th day celebrated as Shavuot (6th of Sivan).

The name of the mitzvah derives from the “Omer offering” sacrificed in the Temple on the 16th of Nisan (the second day of Passover) – the first-fruit offering of the barley harvest. Following this offering, the days were counted until Shavuot, which is also a first-fruit offering – of wheat (the “Two Loaves”). The journey of the Omer count is from barley (animal feed) to wheat (human food) – a symbol of spiritual progress from an enslaved nation to a free nation with Torah.

The Blessing and the Wording

The count is performed in the evening, after the Maariv prayer, from the emergence of the stars. The order:

  1. Stand up
  2. Recite the blessing: “Blessed are You, Lord our God, King of the universe, who has sanctified us with His commandments and commanded us regarding the counting of the Omer”
  3. Count the current day: “Today is X days, which are Y weeks and Z days of the Omer”
  4. Recite “HaRachaman” – a prayer that “the Merciful One restore the Temple service to us”

Example on day 33 (Lag BaOmer): “Today is thirty-three days, which are four weeks and five days of the Omer”.

Infographic - chart of the 49 days of the Omer count in weekly groups
49 days of the Omer count across 7 weeks

Ashkenazi and Sephardic (Edot HaMizrach) Versions

The two main versions:

  • Ashkenazi version – the wording customary in Ashkenazi communities (Germany, Poland, Lithuania, North America). The blessing and count are in standard Hebrew.
  • Sephardic / Edot HaMizrach version – the wording customary in Sephardic communities (Moroccan, Tunisian, Syrian, Persian, and others). There are minor differences in vocalization and word order. Most notably, “ba’Omer” is used instead of “la’Omer” in some traditions.

For more information on the halachic differences between Ashkenazi and Sephardic methods (including prayer times), see the guide to the 4 halachic calculation methods.

Mourning Customs During the Days of the Omer

During the 49 days of the count (except for Lag BaOmer and certain special days), mourning customs are observed:

  • Refraining from haircuts and shaving
  • Refraining from weddings (except for Lag BaOmer, and in certain traditions from the 17th of Iyar onward)
  • Refraining from live music (instead – recorded music is permitted according to some halachic authorities)
  • Refraining from new clothing that would warrant the “Shehecheyanu” blessing

Origin of the customs: According to tradition, during these 49 days the 24,000 students of Rabbi Akiva died in a plague – “because they did not show respect to one another”. The mourning customs commemorate this tragedy.

Lag BaOmer – The 33rd Day

Lag BaOmer (18th of Iyar) is the 33rd day of the count. According to tradition, on that day the plague affecting Rabbi Akiva’s students ceased, and it is also the Hillula (yahrzeit celebration) of Rabbi Shimon bar Yochai (Rashbi), a Mishnaic-era sage who authored the Zohar.

Customs on Lag BaOmer: lighting bonfires (a symbol of the fire of Torah), the Hillula at Meron (Rashbi’s tomb – drawing hundreds of thousands of visitors), song and dance (suspension of the mourning customs), and a child’s first haircut (“Chalakah” – among Sephardim).

LED screen in a synagogue displaying the daily Omer count grid
The Omer count – updated automatically every evening after sunset

How to Display the Omer Count Automatically on a Synagogue Screen

The GoMixApp system for synagogues counts the Omer automatically from the second night of Passover through Shavuot:

  • Automatic display – the count appears only on the 49 relevant days, and is hidden the rest of the year
  • Two versions – Ashkenazi (OMER_COUNTING_SEFIRAT_HAOMER) or Sephardic / Edot HaMizrach (OMER_COUNTING_SEFIRAT_HAOMER_SEPHARDIC)
  • Comprehensive display – the day number, weeks and days, and also the full text of the count
  • Lag BaOmer detection – the system flags the day specifically

For information on additional Jewish content the system supports (43 holidays, 7 formats of daily halacha), see the guide to the Hebrew calendar.

Frequently Asked Questions About the Omer Count

What is the Counting of the Omer?

The Counting of the Omer is a Torah commandment (Leviticus 23:15) to count 49 days from the second day of Passover (16th of Nisan) until the festival of Shavuot (6th of Sivan). The count is performed every evening, after the Maariv prayer, and symbolizes the spiritual progression from the Exodus from Egypt to the Giving of the Torah.

When is the Omer counted?

The count is performed in the evening, after the Maariv prayer, from the emergence of the stars. If one forgot to count in the evening, the count may be made during the following day, but without a blessing. If one entirely forgot during that day as well, from the next day onward one may not continue to recite the blessing, but continues counting without a blessing.

What is the blessing for the Omer count?

“Blessed are You, Lord our God, King of the universe, who has sanctified us with His commandments and commanded us regarding the counting of the Omer”. The blessing is recited before the count. After the blessing one says: “Today is X days, which are Y weeks and Z days of the Omer”.

What is the difference between the Ashkenazi and Sephardic (Edot HaMizrach) versions?

Primarily a difference in the closing wording and phrasing. Ashkenazim say “la’Omer” after the count. Sephardim / Edot HaMizrach say “ba’Omer” or “la’Omer” depending on custom. Vocalization and pronunciation also vary. The GoMixApp system supports both versions.

What is Lag BaOmer?

Lag BaOmer is the 33rd day of the Omer count (18th of Iyar). It is a day of joy – the end of the plague affecting Rabbi Akiva’s students. Customs include: bonfires, the Hillula of Rabbi Shimon bar Yochai at Meron, and the suspension of the mourning customs that are observed during the other days of the Omer (haircuts, weddings, music).

What are the mourning customs of the Omer count?

During the days of the count (except Lag BaOmer and the 19th of Iyar): refraining from haircuts, weddings, live music (in some customs – recorded music is permitted), and purchasing new clothes. Origin: commemoration of the death of 24,000 students of Rabbi Akiva during this period. The mourning customs differ between Ashkenazi and Sephardic communities.

Can the Omer count be displayed automatically on a synagogue screen?

Yes. The GoMixApp system counts the Omer automatically from the second night of Passover (16th of Nisan) through Shavuot. The display includes day number, weeks and days, and you can choose between the Ashkenazi and Sephardic (Edot HaMizrach) versions. The count appears automatically only during the relevant period (49 days), and is hidden the rest of the year.

Summary

The Counting of the Omer is a unique commandment that connects Passover to Shavuot, linking the Exodus from Egypt with the Giving of the Torah. 49 days of spiritual counting that symbolize the progression from an enslaved nation to a free nation with Torah. Automatic display of the count on a synagogue screen saves the gabbai from updating it every evening – and lets all worshipers easily see the current day.

For more details on the digital signage system for synagogues ->