You could do something like:
UPDATE users
SET silenced_till = '3019-02-01 13:00:00,'
SET suspended_till = '3019-02-01 13:00:00'
WHERE <your criteria>
RETURNING id, username_lower
You could do something like:
UPDATE users
SET silenced_till = '3019-02-01 13:00:00,'
SET suspended_till = '3019-02-01 13:00:00'
WHERE <your criteria>
RETURNING id, username_lower