Assertion: leap year's day | /r/CapableOf | slip against the vernal equinox
Facets:
value: afterwards
type: TEMPORAL
value: in persia
type: LOCATION
Source sentences:
text: In Persia (Iran) after the reform in the Persian calendar by introduction of the Persian Zoroastrian (i. e. Young Avestan) calendar in 503 BC and afterwards, the first day of the year (1 Farvardin=Nowruz) slipped against the vernal equinox at the rate of approximately one day every four years.