Monale -- The traditional colors of St. Patrick's Day are green, white & orange, the colors of the Irish flag. The green represents the Republic of Ireland, the orange represents Northern Ireland & the white represents peace. St. Patrick's Day fabrics here in this country may have celtic motifs or shamrocks or even leprechauns, or someone may choose to use just those 3 colors -- green, white & orange. (In this country, everyone is Irish on St. Patrick's Day!)
So, the other option for February is to make a mug rug in green & white. Or multiple greens & whites.
February's swap will be partner's choice, which means the person making the mug rug has to adhere to her partner's choice. So if you decide on green & white, then that's what your partner will make for you. I'm thinking there are no fabrics available to you specifically for St. Patrick's Day, but you can still use green, white & orange, correct?
Some people won't really mind either way.
I hope you find this helpful, Monale.