Modular VFD clock

[Cloud]

This project started as a school assignment, where we had to do something with a microprocessor and since I had a few IV-6 VFD lamps, some RTC modules and MAX 6920/6921 controllers lying around, I decided to make a VFD clock. But because most of the designs on the internet are also displaying seconds I decided to go without it. But the main point is, that the control and display boards are swappable it is possible to just make a shield for a different VFDs or maybe nixies. Please see attached pdf and tell me what you think and what would you change  .

[Raj]

i would have used an rtc that could keep time accurately up to a onth and hook it up to a system that can set it every day.
I've tried ds1307...but it needed me to set time every month so i did this thing... hooked it with my computer vis usb to ttl which sends current time to my atmega8 every time it turns on.