Originally Posted by
alex67500
In addition to CWS' answer, most of the time the Saturday night rule applies to the TATL segments, so what happens after you reach JFK could be irrelevant (you should be able to check in the fare rules).
The Saturday night rule on the DUB fare was to finish the outbound by Saturday night. I phoned this morning and they happily shifted everything forward to have a Saturday night in NYC, traveling on to SFO on Sunday. Thanks for the help. Now to wait for the next AA schedule change...