I'll be honest and say that I don't theme a lot of my maths and literacy activities to special days and holidays. I like to be able to use resources whenever my students need them, not according to the time of the year. I tend to do themed activities in subject areas like art and writing, where I don't have to prepare laminated resources and can display the work on a bulletin board to get maximum bang for my buck. :)
In saying that.... there's something about St. Patrick's Day that inspires a bit of fun! Is it the leprechauns? Maybe the rainbows? Who knows - but I do have some cute activities up my sleeve that I love to use in March.
I love to use 'Roll and Cover' as a familiar activity with my kidlets because it's so easy to differentiate. I start the with number recognition and move on to addition and subtraction as the year goes on. All you need is a mat per child (I like have my kidlets play this game in partners during math center time) and some dice. You can use counters or cubes to cover the numbers, or grab some gold coins from the party section of your local dollar store.
For 'Roll & Add' or 'Roll & Take', children roll 2 dice and use either addition or subtraction skills to figure out which number on their mat to cover.
By printing in blackline you have a different activity - choose 'Roll & Color' either to save ink or to use as a recording sheet for your kidlets to glue into their math workbooks.