How can I order the mysql result by varchar column that contains day of week name?
Note that MONDAY should goes first, not SUNDAY.
Either redesign the column as suggested by Williham Totland, or do some string parsing to get a date representation.
If the column only contains the day of week, then you could do this:
ORDER BY FIELD(<fieldname>, 'MONDAY', 'TUESDAY', 'WEDNESDAY', 'THURSDAY', 'FRIDAY', 'SATURDAY', 'SUNDAY');