On Reformation Day, Reformed and Lutheran congregations commemorate Martin Luther's stand of 1517 with festive services – its 510th anniversary in 2027. In Székely Land – in Háromszék, Marosszék and Udvarhelyszék – it is one of the most important feasts of the Protestant communities.

Recommended places to visit: the Marosvásárhely and Sepsiszentgyörgy Reformed fortress churches.

The date is for guidance only; the exact programme is published by the local parish. For more feasts of the church year, see our article Pilgrimages and Feasts in Székely Land .