Julian calendar In the Julian calendar, the fourteen types of year (seven common, seven leap) repeat in a 28-year cycle (1461 weeks). This sequence occurs exactly once within a cycle, and every common letter thrice.
Julian calendar I?n the. Julian calendar, the? fourteen types of year (seven common, seven leap) r.epeat in a 28-year cycle (?1461 weeks). This sequence occurs exactly once within a cycle, and every common letter thrice.