Default timezone in the athena queries

What is the default timezone in the athena queries? UTC?

WHERE
parse_datetime(requestdatetime,'dd/MMM/yyyy:HH:mm:ss Z')
BETWEEN parse_datetime('2022-09-01:15:40:00','yyyy-MM-dd:HH:mm:ss')
AND
parse_datetime('2022-09-02:10:00:00','yyyy-MM-dd:HH:mm:ss')```

Yes

2022-09-19 20:07:12.221 UTC```

(ran this query in us-west-2)

But your requestdatetime data column is part of your data and might be in a different TZ or format