armenian calendar assyrian calendar astronomical year numbering attic calendar augustus aurelian babylonian calendar balinese calendar bengali calendar berber calendar bikram samwat buddhist calendar calendar calendar of saints calendar round celtic calendar chinese calendar christ christmas computus copt coptic catholic church coptic orthodox church in africa coptic orthodox church in asia coptic orthodox church in australia coptic orthodox church in canada coptic orthodox church in europe coptic orthodox church in south america coptic orthodox church in the united states coptic orthodox church of alexandria coptic alphabet coptic architecture coptic art coptic cross coptic flag coptic history coptic language coptic literature coptic monasticism coptic music coptology darian calendar decree of canopus diocletian discordian calendar easter eastern orthodox liturgical calendar economic calendar egypt egyptian calendar egyptian hieroglyphs egyptian language epip ethiopian calendar fasting and abstinence of the coptic orthodox church of alexandria first council of nicaea germanic calendar gregorian calendar hebrew calendar hellenic calendars hieratic hindu calendar iso week date indian national calendar iranian calendar irish calendar islamic calendar japanese calendar javanese calendar jesus julian calendar julius caesar koiak korean calendar list of calendars lithuanian calendar liturgical year lunar calendar lunisolar calendar malayalam calendar meshir mesoamerican long count calendar mesori minguo calendar month of hathor month of tobi nanakshahi calendar nepal sambat nisan northern hemisphere nowruz paoni paopi paremhat paremoude paschal full moon pashons patriarch of alexandria pentecontad calendar perpetual calendar persecution of copts protestantism in egypt rapa nui calendar revised julian calendar roman catholic calendar of saints roman empire roman calendar rome rumi calendar runic calendar sol invictus solar calendar soviet calendar thai lunar calendar thai solar calendar thout tibetan calendar tonalpohualli traditional burmese calendar tridentine calendar tropical year wall calendar xhosa calendar xiuhpohualli zoroastrian calendar zoroastrianism