Remember Each day begins the Previous Evening i.e., If the first day is Monday, light the candles as the sun sets Sunday.

Preparation day for Passover. The Seder meal is eaten this day. The first sabbath for Pesach / Feast of Unleavened Bread starts tonight. (Leviticus 23:4-8)

The first day of Chag Hamatzot (The Feast of Unleavened Bread). The first and seventh days are High Sabbaths. (Leviticus 23:4-8)

The seventh day of Chag Hamatzot (The Feast of Unleavened Bread). The first and seventh days are High Sabbaths. (Leviticus 23:4-8)