DLPhoenix

I am trying to book a flight to India in April.
It seems as if CO resurected the Saturday night rule for Both EWR ->BOM and EWR->DEL:
For a 4/3 departure with an 4/8 return the system offers B fares only.
For 4/3 departure with a 4/10 return the system offers S fares (i.e. dirt cheap, the plane is empty).

I checked other destinations, the fares are low regardless of the return date.
Other airlines in the market do not match this policy.

Anyone has any idea how to get around this?

Thanks
DLP