DART-SD410 Debian RTC
To set the RTC first set the date from Linux shell, type:
# date --set="20150225 09:04"
Then set the real time clock from Linux shell, type:
# hwclock --systohc --utc
Power down your board wait 5 minutes and power up.
Set the system time according to external RTC chip:
# hwclock -s
Check your system with date and the time should be up to date.