I emailed my local government to ask about whether it is allowed to walk on the trails at night because the signage at one of the places I like to go during the day says that the trails are only open from sunrise to sunset, and it is apparently a county wide rule.
This really depends. Most of the parks I go to do not enforce this timing. As an example, they do not lock the gates/actively patrol the area to look for intruders.
These openings hour usually means “We are not responsible for anything that happened during these time periods”