okay, that helps.
Nokia-N800-51:~# /mnt/initfs/usr/bin/retutime
retutime, Version 1.0.8
Copyright (C) 2004-2005 Nokia Corporation
All rights reserved.

Usage:
-T, --set-time Set date string (in UTC)
(Y-m-d/H:M:00 -- ex. 2004-11-12/13:16:11)
-t, --get-time Get date string
(Y-m-d/H:M:S -- ex. 2004-11-12/13:16:45)
-A, --set-alarm Set alarm string (In UTC; seconds don't count
and date must be within 24 hours from current time)
(Y-m-d/H:M:00 -- ex. 2004-11-12/13:16:00)
-a, --get-alarm Get alarm time
-S, --clear-alarm-status Acknowledge the alarm
-s, --get-alarm-status Get alarm expiration status
-R, --clear-reset-status Acknowledge the reset
-r, --get-reset-status Get reset status
-C, --set-calibration Set calibration data
-c, --get-calibration Get calibration data
-I, --rtc-from-system Set RTC to match system time
-i, --system-from-rtc Set system time to match RTC
-h, --help Show usage

Report bugs to Bugzilla.
Nokia-N800-51:~# /mnt/initfs/usr/bin/retutime -a
Alarm off

This either indicates there are no alarms set or I have to enumerate all possible times using -a to see if an alarm is set for that time.
I set multiple alarms and retested.
Only the first alarm seemed to be shown and in GMT.

Nokia-N800-51:~# /mnt/initfs/usr/bin/retutime -a
2007-02-11/17:00:00Nokia-N800-51:~#

Thanks, It appears the "alarms set but don't appear in the clock applet" is not the source of my intermittent reboot issue.
Do you know how to enable or bring up system logs?