Indian currency abolished

We were having breakfast yesterday and during a break in the conversation, I heard that that the currency had been abolished.  What?  How did I miss this?  I pulled these notes from my wallet.  Due to regular travels, I typically have a lot of reserve currency from past trips.  I thought I was so smart bringing money with me.

Turns out in November, the prime minister made the currency invalid overnight.  I was informed (after much laughing by my friends) that this paper was as useful as toilet paper.  In my defense, I might have been a bit distracted with other news going on in November.