You need iTunes 12.1.2 to be able to sync photos between mobile devices and Photos. You an download it here: iTunes 12.1.2
The new photos app does not show my albums and the help menu is of no help. I likes the "old" iPhoto.
You need to open the sidebar in Photos. The key combination of Option+Command+S will toggle the sidebar open and closed. The albums will be there. All of the iPhoto Events are represented as album in the folder titled "iPhoto Events".
Moments in Photo are the new Events. There's a way to simulate events in Photos.
When the library was first migrated there was a folder created titled iPhoto Events and all migrated iPhoto Events are represented by an album in the folder. To open the sidebar if it's not open use the Option+Command+S key combination.
When new photos are imported into the Photos library go to the Last Import smart album, select all the photos and use the File ➙ New Album menu option or use the key combination Command+N. Name it as desired. It will appear just above the iPhoto Events folder where you can drag it into the folder
When you click on the iPhoto Events folder you'll get a simulated iPhoto Events window.
The downside to the simulation is that the Album/Events can only be sorted by Title. Ask Apple for more sorting options in Photos via https://www.apple.com/feedback/photos.html.