Understanding the Jewish Holiday Calendar in Kosher Certification

Certified companies know that certain times of the year bring changes in office schedules or on-site availability. This is especially noticeable around major Jewish holidays such as Passover.

Understanding how the Jewish holiday calendar works—and how kosher certification agencies plan around it—can help companies schedule approvals and productions more smoothly.

The Jewish Calendar Works Differently

Jewish holidays follow the Hebrew calendar, which is based on lunar cycles rather than the solar Gregorian calendar.

Because the Hebrew calendar does not align with the civil calendar, Jewish holidays do not fall on the same Gregorian date each year. A holiday that occurs in early April one year may fall later in April—or even in March—the following year. Within the Hebrew calendar itself, however, holidays always occur on the same Hebrew dates.

Another unique feature is that Jewish holidays begin at sunset rather than at midnight. This means that when a holiday appears on a calendar date, observance begins the evening before. As a result, offices may close earlier on the eve of a holiday to allow time for preparation.

Why Work Is Restricted During Certain Holidays

Several major Jewish holidays are observed in a manner similar to the weekly Sabbath. During these days, Jewish law restricts many forms of work, including business activities and the use of certain technologies and electronics.

Because observant staff members do not work during these periods, kosher certification agencies may close their offices or operate with limited staff during intermediate days when only certain types of work are permitted.

The Two Longest Jewish Holiday Periods

While there are several holidays throughout the Jewish year, Passover and Sukkot are the two longest holiday periods.

Both holidays last eight days and include multiple days when work restrictions apply. Because of their length, these holidays are the ones most likely to affect scheduling.

Passover, observed in the spring, commemorates the Exodus of the Israelites from Ancient Egypt and includes special dietary laws. This makes it especially significant in the world of kosher certification.

For companies preparing specifically for Passover production, there are additional operational considerations, including ingredient sourcing, equipment preparation, and inventory management. You can read more about these requirements in our earlier article:
Passover: What Certified Manufacturers Need to Know
https://www.ok.org/article/passover-what-certified-manufacturers-need-to-know/

Sukkot, observed in the fall, celebrates the harvest season and the Israelites’ journey through the Sinai desert.

Why Planning Is Important in Kosher Certification

Certain kosher certification activities require on-site rabbinic supervision, such as equipment kosherization or specific production runs. Because a rabbinic representative must be present, these activities must be scheduled in advance.

Clear communication is therefore important whenever companies plan supervised productions or make changes to ingredients, equipment, or production processes. When holiday schedules may affect approvals or supervised productions, our teams coordinate in advance to help ensure everything stays on track.

Planning Ahead During Holiday Periods

While office availability may change during holiday periods, OK Kosher supervision and oversight continue year-round, ensuring that certified companies remain compliant with our kosher guidelines at all times. Maintaining responsive service for our companies remains a priority. Our team carefully plans before and after holidays to coordinate approvals, supervision schedules, and production needs.

By staying aware of the holiday calendar and coordinating ahead of time, companies and certification agencies can help ensure that operations continue efficiently throughout the year.