Github user aditivin commented on the issue: https://github.com/apache/flink/pull/2333 Hi, Only the relevant changes are now visible. Pasting the details from the previous pull request (#2331) here: Added offset parameter for the following processing time window assigners: ProcessingTimeSessionWindows SlidingProcessingTimeWindows TumblingProcessingTimeWindows The offset is an optional parameter that can be added while creating these classes, and it can be supplied as a long value or a TimeZone. Test cases for the change are present in WindowAssignerOffsetTest. There are tests for positive, negative and TimeZone offsets for each of the classes. All Travis CI jobs passed. I haven't done it for the event time window assigners yet - I can add that if this is all right.
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