Mother's Day is a very special day in FatLand, not only because it venerates moms, but because in FatLand, the ideas of softness, nurturing, loving and feeding are not looked down upon.
In the past 100 years, these qualities associated with mothering have come under attack because it has become more and more de rigueur for CEO's and other business-oriented people to appear and perhaps even be hard, nasty, unkind and unforgiving, especially when pursuing ways to increase profits. The qualities considered necessary to make a good CEO are often in exact opposition to those considered necessary to make a good mother.
This is yet another reason that thinness has been prized as a body type. Thin people do not have bodies that are easy to hug. Thin people are not associated with kindness or nurturing and lovableness. See where this is going? The more kindness is considered passe or weak, the more fat people are also considered these things.
Mother's Day in FatLand takes on another added dimension because many who emigrated had to do so without their parents. Thus it was important for counselors to express nurturing and kindness to the new FatLanders, as well as the ability to understand and give them incentives to appreciate themselves and become and feel that they were part of FatLand.
Thus Mother's Day in FatLand continues to be much more than an occasion to send a card with flowers (although these things are certainly welcomed by those who receive them).