Coming from India, you can't stay in Schengen as a tourist without a visa. That means you won't be allowed to stay after the 23rd. http://www.schengenvisainfo.com/who-needs-schengen-visa/
To those who tell you that nothing will happen if you over stay, I can tell you about my personal experience the first time I left Schengen:
I overstayed because I thought I could stay 3 months instead of 90 days, and in those 3 months there were 91 days. I left on the day 91 and the border control noticed it immediately. They took me to a room for about 4 hours and made me endless questions: where have I been, what did I do, they asked me to prove all my stays and travels with tickets and receipts (which fortunately I had with me at that time), they made me sign a paper telling me that a process would start against me through my embassy for overstaying and that I might denied the access to Schengen in the future. Finally, obviously, I lost the flight I was supposed to take. So I had to pay for a new flight right there in order to leave Schengen. You can bet that with this sort of behaviour they make really sure that you will not over stay again.