It's really not all that hard to do, so maybe you could just get it started.
Goes something like this;
1- Pick a day of the year that has some historic meaning that most folks in your country can associate thankfulness for, and name it.
2- Throw a feast for as many family and friends that you can accommodate at the feast.
3- When people ask you what's all the feast and festivities are about, tell them the name of the day and what your thankful for.
4- Celebrate in the name of that day, on the same day, year after year without fail or compromise.
5- Pass the process down to your family and friends.
Over time it will catch on, and folks across the country will be celebrating the day, even if they don't know why.
Rouse