From the second night of Passover until the holiday of Shavuos (7 weeks x 7 days) when we celebrate the giving of the Torah, the Jewish people "Count the Omer," a unique and fascinating mitzvah. Thus tonight we will count six days of the Omer, and tomorrow night we count seven days, which is one week of the Omer.
Also tonight at nightfall, the final two festival ("yom tov") days of Passover begin (encompassing this Shabbat), so BtB will be offline until Saturday night.
Chag Pesch Sameach and Good Shabbes! Be well and be safe.