Todays is Twilight's 963th birthday. She should be happy however every year she cries over the loss of her friends. The last pony friend to die was Starlight Glimmer and since then she has only ever shown kindness to her best friend Spike even though he had to move because of his size. Then he died last year because dragons average life span is 600-800 years. Discord still came around to comforted Twilight but never stopped her in changing the past after discovering her plan. He even gave Twilight a piece of chaos magic to help her to push further back in time.
Showing so much bitterness to Celestia and Luna she broke into the forbidden archives as she planed, with Discord's help but he didn't go with her as she so thought. Sending herself back in time to write the wrong before this all BEGAN........