Lack of hardware clock on Raspberry Pi is not that big of a deal if you are online all the time. For a few $ you can add this feature to your pi.
I ordered mine on eBay for less than $2, so I can recommend the seller here:
New DS3231 Precision RTC Module Memory Module for Arduino Raspberry Pi Continue reading “Add hardware clock (RTC hwclock) DS3231 to Raspberry Pi”