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The Solar holiday recurrence rule type is for holidays that are based on solar events.

 

Solar events

In some cases these solar events are well-known events such as the seasons, the equinoxes, or the solstices.

 

Vernal Equinox, Japan

Vernal Equinox, Japan

Solar longitudes

Some solar holidays are based on a specific solar longitude that is not a multiple of 90 degrees (corresponding to the seasons, solstices and equinoxes).

 

Tamil New Year, India

Tamil New Year, India

 

These holidays are calculated using the default solar data source of the parent holidays set (or a specific solar data source if the use set's default is unchecked).

 

See also: lunisolar holidays rules, other types of recurrence rules and recurrence rules options.