The Route starts on the 28th of March.
The route was moved forward to March 6th and has been taking bookings for that start date for a while now but the Aer Lingus website doesn't seem to be any showing fares at the moment.
Either they've moved the start back to the end of March or it's just aerlingus.com having problems which wouldn't be a surprise.
This is all quite strange. The route was originally scheduled to launch on the 28th of March. Then the start date was moved forward to the 6th of March, but now it seems to have been moved back to the original start date of the 28th of March.
However, as mentioned it could be a problem with the website (technical problems with the website seem to have become more frequent of late).