These yuck hours change over the years, but I don't think they entirely diminish. Colic is painful for them as newborns so have you tried doing things like baths & massage at the beginning of the cranky time, so maybe 5-5.30pm start with a bath & massage to help push out the wind before feeding? If you feed over wind it can make it more difficult for the babies to get it out. I have found massage to be a life saver with colic in Matilda & when Jovie suffers from wind now. Also holding positions help her with the pain in the belly, slings are fantastic for newborns as they hold them more upright & close to you and you can have an arm or two available to move around more.