Until 2016, the kingdom only used the lunar Islamic calendar, not the international Gregorian calendar, but in 2016 the kingdom announced its switch to the Gregorian calendar for civil purposes. Daily life is influenced by Islamic observance. Some businesses decide to close three or four times a day for 30 to 45 minutes during business hours while employees and customers are sent off to pray. The weekend is Friday-Saturday, not Saturday-Sunday because Friday is the holiest day for Muslims. For many years only two religious holidays were publicly recognized – ''ʿĪd al-Fiṭr'' and ''ʿĪd al-Aḍḥā''. (''ʿĪd al-Fiṭr'' is "the biggest" holiday, a three-day period of "feasting, gift-giving and general letting go").