Activities

I have read an article saying that I should not exaggerate number of hours per week spent on a certain activity because it would seem odd; however, I volunteered at the mosque from 12pm to 11 pm everyday for 30 days a year, so thats more than 75 hours a week. is that too much to believe? is it bad to write that on my common app?

You have to put down the number of weeks, which will make all the difference. Is this 30 days straight? Or for example one day a week for several weeks?