```
SELECT date_part('timezone_hour', '2019-12-01 13:37:12 PST'::timestamptz) AS "tz"

```

and 

```
SELECT date_part('timezone_hour', '2019-12-01 13:37:12 EST'::timestamptz) AS "tz"

```

both return `-8`, my local pacific time GTM offset in hours instead of the timezone in the argument of the function.

The same behavior happens for extract:

```
SELECT extract('timezone_hour' from '2019-12-01 13:37:12 PST'::timestamptz) AS "year"

```

and

```
SELECT extract('timezone_hour' from '2019-12-01 13:37:12 PST'::timestamptz) AS "year"

```

both return `-8`.

Why don't I get the time zone offset that I specified for the timestamps?