Today is my name day (Имен Ден.) This is the day that your name sake saint was born, and is celebrate like another birthday. Practically, this means I will take chocolates to work this morning (черпия), and—because this may be the only chance I have to celebrate it in a place where people understand the significance—I will have a small party at my place this evening.
Actually, it is not a Bulgarian name day, since Joel is not used in this part of the world; but this practice is known to a lesser extent throughout Europe. I found out about my name day from this site. Check it out, you may have another day to celebrate too!