In a nutshell, a window is created as soon as the first element that should belong to this window arrives, and thewindow is completely removed when the time (event or processing time) passes its end timestamp plus the user-specifiedallowed lateness (see Allowed Lateness). Flink guarantees removal only for time-basedwindows and not for other types, e.g. global windows (see Window Assigners). For example, with anevent-time-based windowing strategy that creates non-overlapping (or tumbling) windows every 5 minutes and has an allowedlateness of 1 min, Flink will create a new window for the interval between 12:00 and 12:05 when the first element witha timestamp that falls into this interval arrives, and it will remove it when the watermark passes the 12:06timestamp.