Saint Valentine by respectable modern scholars. In the French 14th-century manuscript illumination from a "Vies des Saints" ("illustration above"), Saint Valentine, bishop of Terni, oversees the construction of his basilica at Terni; there is no suggestion here that the bishop was a patron of lovers. During the Middle Ages, it was believed that birds paired in mid-February. This was then associated with the romance of Valentine. Although these legends differ, Valentine’s Day is widely recognized as a day for romance and devotion. The flower-crowned alleged skull of St. Valentine is exhibited in the Basilica of Santa Maria in Cosmedin, Rome. St. Valentine's
Leap year lunar months containing 29 or 30 days, generally in alternating order. However, the tabular Islamic calendar used by Islamic astronomers during the Middle Ages and still used by some Muslims does have a regular leap day added to the last month of the lunar year in 11 years of a 30-year cycle. This additional day is found at the end of the last month, Dhu 'l-Hijja, which is also the month of the Hajj. The Hijri-Shamsi calendar, also adopted by the Ahmadiyya Muslim Community, is based on solar calculations and is similar to the Gregorian calendar in its structure with