This file is indexed.

/usr/share/gridengine/calendars/night is in gridengine-common 6.2u5-7.4.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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calendar_name    night
year             1.1.1997,6.1.1997,28.3.1997,30.3.1997-31.3.1997,18.5.1997-19.5.1997,3.10.1997,25.12.1997,26.12.1997=on
week             mon-fri=6-20