# Module `Time.Date_and_ofday`

Equivalent to a `Date.t`

and an `Ofday.t`

with no time zone. A `Date_and_ofday.t`

does not correspond to a single, unambiguous point in time.

`type absolute`

`= t`

`type t`

`= private underlying`

### Constructors and accessors

`val of_date_ofday : Core_kernel__.Date0.t -> Ofday.t -> t`

`val to_date_ofday : t -> Core_kernel__.Date0.t * Ofday.t`

`val to_date : t -> Core_kernel__.Date0.t`

`val to_ofday : t -> Ofday.t`

### Conversions between absolute times and date + ofday

Based on the offset from UTC at the given time. It is usually simpler to use the `Time.Zone`

wrappers of these conversions.

### Low-level conversions

Convert between `t`

and a synthetic span representing the difference in date from epoch, times the length of a day, plus the ofday's distance from midnight.

These spans do not correspond with any actual duration of time. Arithmetic on these spans is only meaningful within a range where no DST transitions can occur. For example, rounding to the nearest second makes sense but adding arbitrary spans does not.

These functions are intended for low-level DST transition arithmetic. Most clients should not call these functions directly.