cf
CellMeasure.
leap_month
The leap_month CF property.
>>> f.leap_month = 2 >>> f.leap_month 2 >>> del f.leap_month
>>> f.setprop('leap_month', 11) >>> f.getprop('leap_month') 11 >>> f.delprop('leap_month')
cf.CellMeasure.history
cf.CellMeasure.leap_year