During the week of Unleavened Bread, Firstfruits occurs. Traditionally, it rests on the day after the Sabbath, Day 1 (or Sunday). As the story goes, there are 7 weeks (from the Sabbath) to count and the next day (Day 1) becomes the Feast of Weeks (Shavuot). Regardless of when you observe Passover/Pesah, you can use the Shavuot Countdown Calendar to identify the date you will keep for Firstfruits and count the weeks until Shavuot. At the bottom of the calendar,  students can record the day Shavuot will rest on according to your  feast observations.