Why in the ISO 8601 calendar, years beginning/ending on Thursdays have 53 weeks?
That seems weird to me, because common years starting on Thursdays (and leap ones beginning on Wednesdays) have only one month beginning on a Monday: June. why?
That seems weird to me, because common years starting on Thursdays (and leap ones beginning on Wednesdays) have only one month beginning on a Monday: June. why?