I actually did not know System Event Scheduler existed... The only similar app I knew was "silencer" but I felt its UI was confusing.

About SES, from what I could read at http://nokia-n900.com/silent-on-time...ent-scheduler/, I noticed the following differences:
- It seems SES is more "generic" than TimedSilencer. This means SES allows for a little more customization but is probably a little harder to use.
- TimedSilencer has no Offline/Online modes support
- TimedSilencer handles events a bit differently. A Silencing event is always associated with an unsilencing one (they are not handled separately as in SES). Personally, I find it easier the way it's done in TimedSilencer but I guess it is a matter of taste

Thank you for introducing me to SES. I will probably check it out after my vacation to see how it works