WEBHinamatsuri is one of the five seasonal festivals (五節句, gosekku) that are held on auspicious dates of the Lunisolar calendar: the first day of the first month, the third day of the third month, and so on. After the adoption of the Gregorian calendar, these were fixed on 1 January, 3 March, 5 May, 7 July, and 9 September.