date / time conversion from user's local time to UTC on website
问题 I'm currently adding an out of office like system to a website, where users will be able to mark their out of office dates and times such that they can provide another users's information to use as a backup while they are out. The problem I have, is converting the users's local time to UTC. I've seen other posts that address this issue by supplying UTC to the user, and having the client (js) convert the time to and from local time. I do, however, have access to a propriety system I can use to