[Celerity]

This address may work ?

https://my.barackobama.com/page/event/search_results?orderby=day&zip_radius%5b0%5d=13202&zip_radius%5b1%5d=40&country=US&radius_unit=mi

I entered in a search for events happening within 40 miles of syracuse (13202 zip) and then clicked on the 28th.

[Celerity]

Ah ha ! Got it.

They changed the designation numbers:

https://my.barackobama.com/page/event/detail/dayofaction/gskwqj