timezone() — PostgreSQL function

Summary

timezone is a PostgreSQL built-in function in the Date/Time Functions group. PostgreSQL’s system catalog (pg_proc) describes it as: “adjust timestamp to new time zone”.

Signature

timezone has 9 documented overloaded forms:

timezone(interval, timestamp with time zone) → timestamp
timezone(text, timestamp with time zone) → timestamp
timezone(timestamp with time zone) → timestamp
timezone(text, time with time zone) → time with time zone
timezone(interval, time with time zone) → time with time zone
timezone(time with time zone) → time with time zone
timezone(text, timestamp) → timestamp with time zone
timezone(interval, timestamp) → timestamp with time zone
timezone(timestamp) → timestamp with time zone

Argument and return types are taken from the pg_proc catalog; internal type names are shown using their readable SQL spellings (for example int4 is shown as integer). (Derived from the catalog — see the linked reference for the canonical documentation.)

Classification

Category: Date/Time Functions
Kind: Function
Volatility: IMMUTABLE — Marked IMMUTABLE — it always returns the same result for the same arguments and can be used in indexes and other contexts that require immutability.
Returns: time with time zone, timestamp, timestamp with time zone

Example

Illustrative form (replace placeholder values with your own data):

SELECT timezone(INTERVAL '1 day', TIMESTAMPTZ '2024-01-15 10:30:00+00');

The example above is illustrative and is meant to show calling syntax only; consult the linked PostgreSQL documentation for exact semantics, edge cases and accepted argument combinations.

Version applicability

timezone is present across the surveyed releases (PostgreSQL 15, 16, 17, 18, 19). On older major versions, behaviour may differ in detail — always check the documentation for the version you run.

Related & references

Reference: PostgreSQL documentation — Date/Time Functions.