This reply is a bit late. The last few days before Christmas Day can be quite busy for me. I run a business. So in addition to preparing for Christmas celebration for my family, I would have to plan the company's party, show up at clients' parties, prepare gifts for my kids' friends at school.
Most Filipinos are Christians. Around 80% are Catholics. So, Christmas or Pasko celebration is a big deal here in the Philippines, steeped mostly in Christian tradition with a few western and Asian influence.
Retails stores, such as malls, already market their Christmas decor and holiday sales as early as September. Individuals, I believe, do not do their Christmas shopping this early. I myself do not shop this early, except for company giveaways, which can be bought at wholesale prices in Divisoria in Manila. Divisoria is also a place for bargains for Christmas gifts, which is why it can get really crowded come October up to December.
Filipinos decorate their houses with lights, Christmas trees and other decor as early as November. Us, we decorate early December. The most iconic Christmas decor here is the parol or star-shaped lantern. The star symbolizes the star of Bethlehem which led the three astrologers (sometimes known as the 3 wise men) to the manger where Jesus was born. Usually hung outside the house, the parol can be a simple star made of paper on a bamboo framework or as elaborate as capiz shell lantern with synchronized multicolored lights. There are even parolcompetitions such as this one in Pampanga:
Very rarely, or maybe never, will you see real Christmas trees here, like the ones in the US. I guess it's because they can attract all sorts of bugs and would easily wither considering Philippine weather. So most are artificial. And if a family does not have a budget for a plastic tree, they might improvise by making a cone shaped "tree" made of paper or other materials.
Gift giving is part of the tradition. Come December, malls and retail stores slowly get more and more crowded, especially after employees receive their 13th month pay (end of the year bonus equivalent to 1 month's salary which is mandatory under Philippine law).
Part of Catholic tradition is attending the misa de gallo, which is a mass held at dawn for each day from December 16 to 24. Filipino Catholics believe they will receive a special blessing if they have complete attendance for all 9 masses. Catholics go to the Christmas eve mass, or Simbang Gabi which begins around 8pm. After the mass, the family gathers around for the noche buena meal, and then open their presents.
In our family, we attend the Christmas morning mass instead of the Christmas eve mass because our kids would be too sleepy to attend the evening mass. We do let them open one Christmas gift on Christmas eve and the rest they can open on Christmas Day.
Most companies hold a Christmas party. This year, we had ours at restaurant with a private room for videoke. We had a lot of fun as the workers also brought their kids and joined in the games.
After Christmas, the next celebration is New Year's Eve. Some light firecrackers and fireworks. Unfortunately, some get hurt lighting firecrackers, especially children who sometimes would buy substandard and dangerous firecrackers, which are illegal. Those who can afford it would buy fireworks. We do not buy and just watch other people's fireworks from our terrace.