date :: {year, month, day}

datetime :: {date, time}

day :: 1..31

hour :: 0..23

minute :: 0..59

month :: 1..12

nanosecond :: 0..999999999

second :: 0..59

t :: %Toki.DateTime{day: day, hour: hour, minute: minute, month: month, nanosecond: nanosecond, second: second, year: integer}

time :: {hour, minute, second}

timestamp :: {megasec :: pos_integer, sec :: pos_integer, microsec :: pos_integer}

year :: integer