Yes! You might be surprised to learn that it’s very common for babies to be sleepier in the morning than in the afternoon. This is counterintuitive for most parents. One would think that after a night of rest your baby's wake window would be longer but this is rarely the case. So, you may need to not only adjust your wake windows by age but also by time of day. Try shorter wake windows in the morning and longer ones in the afternoon to see if that works better for you and your child.