lookup function help

ok i have seperate sheets monday through sunday

in my example on sheet 2 if on sheet 1 named monday i want to look in column c1 and if the number 1 for example is in c1 through c8 or whatever i want the corresponding name in a1 to show up... my actual schedule is more complex but im sending this example to simplify my question and hopefully show what i need... thanks in advance everyone is so awsome on here!