answer you use the date july of ad as thot and retreat one date back every years or days back in years example years is days back to may of ad or apr of ad then add days in our or century to have gregorian may in ad another years to ad and leap days takes all the dates back to april then is april in reply to the post below which says the coptic calendar is not egyptian the answer is our september as thot is julian august though the coptic calendar egyptian with leap days was accepted in ad which era of diocletion is the era of christian martyrs so coincidentally the year of adam in the jewish book of josephus published in rome this calendar leap day was created in bc by augustus octavius caesar who inaugurated it in bc when thoht becomes august therefore the coptic calendar is julian not gregorian events against america have been on egyptian dates the august invasion of kuwait is julian july and the invasion takes place at degrees where the rise of sothis occurs on that date only at that latitude this implying saddam chose the rise to invade however they felt world trade controlling oil was usa blame another date is thoth was feb in bc in the world trade was bombed on gregorian feb not taking into account that julian feb is march march in leap year the coptic calendar honors this date as the half year placing pamenot on march and the internet terrorists attempt to destroy world trade by constantly revising the march virus