If have the following Event defined in my Database
In Sybase Central the next planed execution is shown to be 31. March 2017.
I use 220.127.116.113
I can reproduce this V17 as well (using the wizard too) so it looks like a bug.
* I will check into this and let you know. *
For reference my test case SQL script looks like this
One easy workaround would be to add a Feb 28th event for the same; to cover this hole in the schedule for these next 3 years. We should have it fixed before the next leap year I suspect.