By the Gregorian rule of intercalation the coincidence of the solar and civil year is restored very nearly every 400 years.
Consequently, the intercalation and suppression of lunar months.
They divide the year into twelve months of thirty days, and add five days by intercalation.
Had he done so it would now fall on the 24th, by adopting the Gregorian rule of intercalation.
Whenever the intercalation is made there must necessarily be a change in the dominical letter.
The first of these, 1/4, gives the Julian intercalation of one day in four years, and is considerably too great.
intercalation of freshwater beds and of boulder clay and sand at Mundesley.
The fraction 8/33 offers a convenient and very accurate method of intercalation.
There was an intercalation made in the calendar this year, which took place on the day after the feast of Terminus.
Dion Cassius in expressing the rule as to intercalation uses the phrase, διὰ πέντε ἐτῶν.