Without the Sabbath, there is no day of Pentecost. This Sunday is Pentecost, btw. AKA Shavuot.

'You shall also count for yourselves from the day after the sabbath, from the day when you brought in the sheaf of the wave offering; there shall be seven complete sabbaths. 'You shall count fifty days to the day after the seventh sabbath; then you shall present a new grain offering to the LORD. (Lev -16)