Answer: epacts

AnswerCrossword Clue
EPACTSSolar year-lunar year differentials
EPACTSSolar excesses over lunar years.
EPACTSLunar periods.
EPACTSPeriods astronomers reckon.
EPACTSSolar-lunar differentials
EPACTSLunar-year differences
EPACTSPeriods added to harmonize the lunar and solar calendars
epactsthe difference in days between a solar year and a lunar year
epactsEPACT, the moon's age on January 1st
epactsthe number of days since the new moon at the beginning of the calendar year, January 1