Acolytes or Altar servers assist the clergy during services. They might carry the cross, candles or liturgical fans in processions and entrances; maintain the censer, ensuring it has enough live charcoal, loading it with incense and handing it to the priest when required; preparing the hot water (zeon) in time for it to be added to the chalice at the Divine Liturgy; prepare the antidoron for the people to receive after Holy Communion; and any other necessary tasks. Altar servers must be on time each Sunday and participate at the special services throughout the year.