According to the writer D. Photiadis and others, before 1838, 1 January was considered the national holiday, a date which was voted on by the First National Assembly at Epidaurus the first Greek "Constitution", or the "Provisional Regime". It is therefore believed that by changing the date "the national holiday was losing its political and revolutionary character and taking on a religious nature" with whatever that entailed concerning the assertions of democracy and a constitution. The historian Chr. Koulouri, who researched national holiday-type celebrations from 1834 and after, does not include in them 1 January, but instead six dates related to the royal family. The main celebration before the establishment of 25 March was 25 January, the anniversary of King Otto's landing in Nafplio (1833).