To show that unbelievers even in their birthdays, that they should be pleasing the LORD instead of themselves are clearly, pleasing, fascinating and enjoying themselves and not the LORD GOD who gave them their lives.
Are you pleasing the LORD?
Yes. all by faith. Hebrews 11:6
Hebrews 11:6 (Amplified Bible)
But without faith it is impossible to please and be satisfactory to Him. For whoever would come near to God must [necessarily] believe that God exists and that He is the rewarder of those