in my industry, we have the option to offset rest days in case of sample shipment plus our shift schedule is decided on when we're the most productive. so in my case, i don't do 9 - 5, i have a 6 - 2 and that really works for me because I'm usually sleepy and useless in the afternoon while my assistant works a 10 - 6 shift or later than that because she likes night time. then as for our offsets, on some weeks, we don't get a day off but on some weeks, we can have the entire week off and we're still paid so it's nice ^^ mining has its own rules, in a sense