Date Functions

"add_months (d, n)"

Date d plus n months

"months_between (d, e)"

Months between dates d and e (d-e)

last_day (d)

Last day of the month containing date d

"next_day (d, weekday)"

"new_time (d, z1, z2)"

"round (d[, fmt])"

"trunc (d[, fmt])"

"extract (c from d)"