This coming Thursday is Ascension Thursday - the day we celebrate Jesus' ascent into Heaven to be seated at the right hand of God the Father, Almighty! Then the following Sunday is the Sunday After the Ascension - and the last Sunday of Eastertide. Following the precepts of Holy Mother the Church, be sure you have received Communion by this coming Sunday - and if you have not made Confession in a while, this would be an opportune time to take care of two precepts! Get yourself to confession! Come out a new creation, relieved of the burdens of sin and back into the state of Grace - and then get to the Eucharist!
I said to receive Holy Communion (Eucharist) by this coming Sunday - which is the Sunday After the Ascension, for the following Sunday is Pentecost - HOWVER - that was assuming one only goes to Sunday Mass! If you go to daily Mass, or go to A daily Mass and receive the Eucharist prior to Pentecost Sunday, then you have fulfilled this precept.