Easter Even / Holy Saturday / The Great Sabbath (Christian, Orthodox)
The Saturday before Easter and last day of Holy Week.
In Roman Catholic Churches, the altar is either stripped completely bare or coloured in violet, while the administration of the sacraments is severely limited. Holy Communion is given only as Viaticum. All Masses are strictly prohibited. No Mass at all appears in the liturgy for this day, nor for the preceding day, Good Friday. Many of the churches of the Anglican Communion observe most of the same traditions, however their altars are usually stripped or coloured in black.*
* source: wikipedia – Holy Saturday