Year NUMBER@1 -LRB- MDCLXXX -RRB- was a leap year starting on Monday -LRB- link will display the full calendar -RRB- of the MISC@1 calendar -LRB- or a leap year starting on Thursday of the 10-day slower PERSON@1 calendar -RRB- .

Year NUMBER@1 was a leap year that started on a Monday when using the MISC@1 calendar .
