Report bundles in Report Distributor (Report Center scheduling - classic view) cannot be scheduled for longer than 3 months.
SAP SuccessFactors Online Report Designer & Workforce Analytics
The three month limit on the expiration date is deliberate. (Unnecessary processes continuing indefinitely can accumulate a large server load and affect performance.) There is no way to permanently circumvent it.
Within this limitation, the date can be extended at any time, so some staggered sessions with different bundles can synchronise them all so that only one quarterly maintenance is required. If the date expires the bundle is not deleted, it simply deactivates and can be restarted by setting a new date.
The b1802 release, to be applied to Production servers in March 2018, will extend the limit to two years, reducing the overall need for maintenance.
KBA , LOD-SF-ANA-RCT , Report Center , Problem