Excell 2013 - conditional formatting using a formula- apply rule

Hello,

I am trying to do the following :
A1:A100 ==> dates
B2:B100 ==> dates
1) apply conditional formatting to columns C1:BB1 if the contained date is in between A1 and B1 [can do that using a conditional rule with formula]
2) apply the respective rule to cells C2:BB2, ..., C100:BB100 [using the respective A2, ..., A100 and B2, ..., B100]

I cannot find a way other than do it one by one (...)

Thanks in advance,
Manos