From the second night of Passover until the day before the holiday of Shavuot, the Jewish people engage in an unique mitzvah called Sefirat HaOmer (counting of the Omer). The Torah commands us that during this time each year we count seven complete weeks, for a total of 49 days. At the end of the seven-week period we celebrate Shavuot, which means “weeks.”

This is considered a mitzvah, so the count, which takes place each night, is preceded by a blessing. However, we may recite the blessing only if we have not missed a single day’s counting.

To read the full article:

https://www.chabad.org/library/article_cdo/aid/256073/jewish/Why-Do-We-Count-the-Omer.htm

Omer Calendar

Omer Schedule for 5778-2018 Click on any date to view the complete prayer in Hebrew with English translation for that day’s Omer count.

To read the full Omer Count:

https://www.chabad.org/holidays/sefirah/omer-calendar_cdo/jewish/Omer-Calendar.htm