The week after Shavuot

Hi,

Although Shavuot is a brief holiday, a small element of celebration continues for a week afterward.

When we have a Beit haMikdash, Jews who come to the Beit haMikdash for aliyah laregel ( pilgrimage for holidays) bring a special korban (offering). That korban may be brought for a full week - Shavuot itself, plus 6 days.

To mark those days when one could bring this celebratory korban, we do not say tachanun for 6 days after Shavuot.

(Mishneh Berurah 131:36)

Have a great day,
Mordechai