[radicalbyte]

As long as you keep the food in the fridge and heat it properly when you reheat it (so it gets boiling hot) the vast majority of food keeps for several days in the fridge.

I leave pea soup and pot currys at room temp (19-23c) for 24-48 hours before I eat them; after that they keep for several days in the fridge.

If you live in a warm climate and/or leave food uncovered all day then you're asking for problems. In those cases I wouldn't reheat them..