A crastinal tense (abbreviated CRAS) is a future tense applied to a following or subsequent day. (Crāstinō diē is the Latin for 'tomorrow'.)^[1]

Crastinal tense refers to an event which will occur tomorrow (in an absolute tense system) or the following day (in a relative tense system). A post-crastinal tense indicates some time after tomorrow or the following day.

Crastinal future (as opposed to a more generic near future) is uncommon, but is found in several Bantu and related languages, such as Luganda^[2] and Chichewa.^[3]