+) lib/date_time::date_time_dateToStr(const DateTime *dt, char str[DATE_TIME_DATE_STR_SIZE])
   prints date from _dt_ to _str_ in format
   MMM DD YYYY

+) lib/date_time::date_time_timeToStr(const DateTime *dt, char str[DATE_TIME_TIME_STR_SIZE])
   prints time from _dt_ to _str_ in format
   hh:mm:ss

+) unit tests for both functions

+) lib/date_time::DateTimeMonthsStr --- an array of three letter months