Triduum - three full days - Holy Thursday evening, Good Friday, Holy Saturday into Easter morning.
Tomorrow evening begins Holy Thursday. Tomorrow celebrates the Last Supper and Jesus washes the feet of his disciples.
My parish has a Good Friday evening liturgy but I am going to attend a traditional, Latin, liturgy at 3pm.
Saturday evening is the Great Easter Vigil.
I hope that you make plans to participate in this special time. It is the most important feast of the church - the death and Resurrection of our Lord.