Why does God have to demand for you to do why can't you just show God love and do more without being asked or forced , it's not a fast if it's not 24 hours or more , eating a large breakfast then skipping lunch and eating a huge dinner isn't fasting no matter how many excuses you make
Anything less than 24 hours is just considered skipping a meal if you're going to do something do it right and with full effect otherwise it's just half measures