Optimize affiliate link
Suppose Christmas is coming, then in your blog, place links to those products that you think people usually buy on Christmas. You can search for products on Amazon or other sites and use those affiliate links in your blog.
Optimize posts for money
During the festival season, write review posts on your blog about products related to the festival. In this way, you can get a large number of affiliate sales.
Optimize posts for traffic
To get high traffic during the festival season, you can start some sort of contest or giveaway on your blog/site.
Optimize your blog theme
To leave a good impression on your readers, you can change your blog theme/template for 2-3 days related to the festival. For example, if it’s Christmas, you can switch to a Christmas theme, etc.
Optimize your blog for SEO
During the festival season, try writing on topics you think people will search for more. Now, you will say, if you have a tech blog, how can you write on other issues? For this, you can create a new blog category called off-topics and share off-topic articles there. Do read my article titled Write Off Topic Content And Get Traffic
Optimize hosting
If you expect high traffic during festival seasons, switching to a reliable hosting service with high bandwidth, space, and CPU usage is good.
I am sure you will benefit greatly from the upcoming festivals by following the tips above.