Synodic months, based on the Moon's orbital period with respect to the Earth-Sun line, are still the basis of many calendars today, and are used to divide the year.
Wulan-wulan sinodik, manut periode orbit Bulan kantun mapakilitan sareng garis Gumi-Surya, kantun manados aled ring akéh kalénder sané mangkin, taler kaanggén antuk ngawagi warsa.