Today is Holy Saturday. After his death on Good Friday Jesus was placed in a tomb and lay there until his Resurrection on the day we call Easter Sunday. There is little liturgical activity on Holy Saturday and indeed it is a day of waiting. The Apostles were confused and hid away in a room not sure what had happened.
For your Holy Week Timeline, leave the space blank under the heading ‘Holy Saturday’ and this will reflect the emptiness of the day.
However, everything changes with Easter Sunday and liturgicallly with the Great Easter Vigil.