Welcome back!
Siniri did a great job of summing up the biggest changes.
If you want a play-by-play, I'd suggest checking
JN's History (which shows dates for new p/bs', links to event summaries, etc). They don't have anything up yet for this year, but so far, it's been the daily Faerie Quest event and the current Negg hunt event.
Some things to note that I can't remember if they changed in the last 4 years, or sooner:
*Faerie Quest rewards now go to your ACTIVE pet. So make sure whatever pet you want to get the stats is active. Plus, Faerie Quest rewards have gotten better....and there are some new faeries.
JN's quest info*
Trudy's surprise is a new daily wheel that appears until you spin it. Some of us
post daily, just to keep track of when we spun and what day we're on (as the last 15 are identical).
*Several things updated on Neopet's 15th birthday. You might want to read our
thread on that.
*New Dailies (some of these may be not new for you, but I just went back for several years):
Kiko Pop,
Grave Danger,
Spaceship Interior (Random Event Machine),
Anchor Management,
Forgotten Shore,
Negg Cave,
Faerie Caverns,
Apple Bobbing