The vernal equinox arrives on Thursday ... They break down the year into three-month seasons based on annual temperature cycles. By that calendar, spring starts on March 1, summer on June 1, fall on ...

These graphics explain why Easter Sunday changes each year based on ancient interpretations of the solar and lunar cycles.

The vernal equinox arrives on Thursday ... into three-month seasons based on annual temperature cycles. By that calendar, spring starts on March 1, summer on June 1, fall on Sept.

Did you know both the astronomical first day of spring and Easter Sunday are tied to the spring equinox? How they relate, ...

Easter's date is based on the lunar calendar. Easter is observed on the first Sunday after the first full moon following the spring equinox. Easter can be as early as March 22 or as late as April 25.

Easter's date is based on the lunar calendar. Easter comes on the first Sunday after the first full moon following the spring equinox. The next full moon will be on April 13, so Easter 2025 ...

By that calendar, spring starts on March 1, summer on June 1, fall on Sept. 1 and winter on Dec. 1. Spring is here — officially, at least. The vernal equinox arrived on Thursday, marking the ...