Mother inlaw picked a wedding date for us in 2014. Is that ok?

She said August 30, 2014 is good for an ox born 1973 and tiger girl born on 1975 to get marry .but I heard everyone said that's not a good day. Sucks we couldn't get to choose our day . I prefer Aug 2, 2014. Please help if August 30, 2014 Saturday is safe to be marry .