Corpus Christi (Latin for Body of Christ) is a Western Catholic feast. It is also celebrated in some Anglican and Lutheran churches. It honors the Eucharist, which believers hold to be the actual body and blood of Christ, and as such it does not commemorate a particular event in Jesus' life. It is held on the Thursday after Trinity Sunday or, in some places, on the following Sunday. Its celebration on a Thursday is meant to associate it with institution by Jesus of the Eucharist during the Last Supper, commemorated on Maundy Thursday, and this is the first free Thursday after Paschaltide.

The Feast of Corpus Christi, which is a moveable feast, is celebrated on the Thursday after Trinity Sunday or, in countries where it is not a Holy Day of Obligation, on the Sunday after Holy Trinity