addDays -is:exact

addDays :: Integer -> Day -> Day

time Data.Time.Calendar, rio RIO.Time, time-compat Data.Time.Calendar.Compat, rebase Rebase.Prelude

addDays :: Days -> Day -> Day

thyme Data.Thyme.Calendar

Add some Days to a calendar Day to get a new Day.

addDays = flip (.+^)
addDays n d ≡ d .+^ n

See also the AffineSpace instance for Day.

gDateAddDays :: GDate -> Word -> GDate

glib System.Glib.GDateTime

dateAddDays :: (HasCallStack, MonadIO m) => Date -> Word32 -> m ()

gi-glib GI.GLib.Structs.Date

Increments a date some number of days. To move forward by weeks, add weeks*7 days. The date must be valid.

dateTimeAddDays :: (HasCallStack, MonadIO m) => DateTime -> Int32 -> m (Maybe DateTime)

gi-glib GI.GLib.Structs.DateTime

Creates a copy of datetime and adds the specified number of days to the copy. Add negative values to subtract days. Since: 2.26