It was struck in the year 5771 by the Hebrew reckoning, which equates to AD 2011.
If you are curious, the date-word is the one to the right of the large numeral 1. The symbol that looks like a quotation mark " in the next-to-last place in the word is called "gershayim", and is there to tell you "this is a number and not an actual word". Hebrew numerals are values assigned to each of the letters of the alphabet, hence the need of the gershayim to distinguish between letters and numbers.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis