Notification time for birthdays

Hi,

I have several birthday calendar entries in my Notes calendar (Release
6.5.3). The system sets the time for notification always at 4:00 in
the morning. This is normally no problem because I start my computer
at 8:00 when I enter the office. So first thing that pops up is the
birthday notification.

But lately I started to synchronize my calendar with my mobile phone,
and this thing is not turned off during the night - so it starts to
ring at 4:00.

I tried to change the alarm time for some entries, but that doesn not
have an effect. Isn't there some general default alarm time field for
birthdays?

Thanks,

Axel.