I remember the JWs used to criticize the "eat, drink, and be merry" philosophy "for tomorrow we might die" and I used to think that it was a good thing that I was doing something worthwhile with my life instead of being distracted with the material things, or fleshly things of the world. That the philosophy was so fatalistic, that tomorrow we might all be dead and anyone believing in the "eat, drink, and be merry" philosophy were all so hedonistic.
Today, I hear that and have different feelings towards the saying and philosophy. I see it more realistic than fatalistic. The idea is that who knows what will happen, enjoy life, enjoy every meal, be happy, life is short.
I now view JWs as the fatalists. They are always planning on the big day of destruction, so they lose sight of the simple pleasure of life, which consist of good meal, good drinks, and being "merry" or happy. Instead of finding joy in everyday living, they put happiness on hold.
That is why holidays, celebrations, parties are all so important. Life is so glorious it should be celebrated.