For many time zones, you're already into tomorrow. The west coast not so much.
NaNoWriMo

<What are YOU writing about?

This is straight cringelord GaryStu-OC fantasy, but I've half a mind to start on quasi timeslip where glim-glam sends herself an ever-changing photo album that helps explain why she pursued immortality. This is the only way she could assure she'd be around in 300 years, and now she can save Celestia's life by convincing the mane-6 not to start a fight with the inter-dimensional interloper.
Or, you know, this might end Twilight's life much sooner if she screws up her own directions.