1.Do not skip it because eighty feels like the bigger one
This is the most common mistake and the one that stings quietly. Families reason that eighty is the real milestone and give seventy a restaurant table, and the person spends the evening aware of the arithmetic. Nobody is promised eighty, and at seventy they can still enjoy a full day without needing to rest halfway through it. Treat this as the big one and let eighty look after itself.



