crontab
the_command runs only on odd days
bash
test $(((`date +%j` % 2))) != 0 && the_commandthe_command runs only on odd minutes
bash
test $(((`date +%M` % 2))) != 0 && the_commandthe_command runs only on even days
bash
test $(((`date +%j` % 2))) == 0 && the_commandthe_command runs only on even minutes
bash
test $(((`date +%M` % 2))) == 0 && the_command