Ardunio code won't compile due to AVR PROGMEM changes

[klyap]

Need to change lines such as PROGMEM const char* weekString[] to PROGMEM const char* const weekString[], otherwise, it'll report errors like:

error: variable 'weekString' must be const in order to be put into read-only section by means of 'attribute((progmem))'

Arduino wiki for AVR PROGMEM errors

[Young-Bae Suh]

Thanks for your reporting.
I'll fix it in a few days!

[Vraj Shah]

PROGMEM const char* const weekString[] = {"", "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
PROGMEM const char* const ampmString[] = {"AM", "PM"};

use this instead