USCIS published an updated edition of Form N-300, Application to File Declaration of Intention. The new edition is dated 03/30/16. Starting 7/15/16, USCIS will only accept the 03/30/16 edition. Until then, you can use the 03/21/13 edition.
DO: Houston
2.26.14 : N400 Couriered to Lewisville, TX
2.27.14 : Package Delivered
2.28.14 : USCIS Priority Date
3.05.14 : Check cashed
3.05.14 : N400 accepted - Email Notification
3.06.14 : NOA received
3.07.14 : Online Status FP appointment notice mailed
3.13.14 : Received FP Notice - 03/25/14
3.14.14 : FP done - walk in
3.19.14 : Status changed to In Line for interview scheduling
7.11.14 : Status changed to Scheduled for Interview
7.21.14: Received Interview Letter
8.19.14: Interview
8.19.14: Oath Letter
8.27.14: Oath
02/06/14: N-400 couriered to Phoenix, AZ - Santa Ana CA DO
02/07/14: Delivered
02/07/14: Priority Date
02/12/14: Check Cashed
02/14/14: Received NOA letter
02/21/14: Online Status FP appointment notice mailed
02/24/14: Received FP Notice - 03/04/14
02/25/14: FP done - walk-in Santa Ana CA
03/03/14: Online Status Changed to "In Line"
07/18/14: Received Interview Letter
08/20/14: Interview
I just passed my interview .
3/11/2016: N-400 Mailed. (Friday)
3/14/2016: N-400 received as per FedEx. (Monday at 10:30am)
4/1/2016: Finger Printing Notice Received. (18 days after they received).
4/12/2016: Finger Printing Done (29 days after they received package).
4/18/2016: Got letter with the interview date (6 days after finger printing, 35 days after they receiving package)
5/23/2016: Interview date
5/23/2016: Interview done. And I was approved