I tried to use the alarm clock on my new server set up and found that it didn't work. The server is normally suspended and wakes properly using WOL. Wake set by OS is set in the BIOS.
Digging a little deeper:
media@media-pc:~/Desktop$ dmesg |grep rtc
[    2.067321] rtc_cmos 00:00: RTC can wake from S4
[    2.068425] rtc_cmos 00:00: rtc core: registered rtc_cmos as rtc0
[    2.068488] rtc_cmos 00:00: alarms up to one day, y3k, 242 bytes nvram
[    2.122240] rtc_cmos 00:00: setting system clock to 2019-04-06 10:49:19 UTC (1554547759)
It therefore appears that the motherboard only supports alarms up to one day. Has anyone come up with a workaround? The concept would be along the lines of a scheduled wake each day to set the alarms.

Help appreciated.