Lent is the forty day period before Easter, excluding Sundays, it begins on Ash Wednesday and ends on Holy Saturday (the day before Easter Sunday).
Since Lent is a period of prayer and fasting, it is fitting for Christians to imitate their Lord with a forty day period. Christ used a forty day period of prayer and fasting to prepare for his ministry, which culminated in his death and resurrection, and thus it is fitting for Christians to imitate him with a forty day period of prayer and fasting to prepare for the celebration of his ministry's climax, Good Friday (the day of the crucifixion) and Easter Sunday (the day of the resurrection).
Each Wednesday evening during the forty day period of prayer and fasting Rehoboth has a Lenten Souper Supper and a half hour or so of worship and prayer.
Everyone is welcome.