I saw one suggestion to use a DS1302 because it has a charging circuit already in the RTC. I don't know how if differs in power consumption or if you might be able to charge the cap to a higher voltage and give you a long power off time.
I saw one suggestion to use a DS1302 because it has a charging circuit already in the RTC. I don't know how if differs in power consumption or if you might be able to charge the cap to a higher voltage and give you a long power off time.