I ran into this a while back when I wanted to make sure every user got emailed a report at 6am, Monday morning, their local time. My chosen solution was a scri

I ran into this a while back when I wanted to make sure every user got emailed a report at 6am, Monday morning, their local time. My chosen solution was a script to be triggered by a cronjob that ran when reports needed to be emailed out, but not otherwise, eg, at 6am in every timezone, every Monday. All I needed to do was figure out what times those were. Simple right? It didn't take long until I realised I needed to make some concessions to reality. :)