Switch -TB[m,c,a,o]<date> - process files modified before the specified date
Process only files modified before the specified date. Files matching the specified date exactly are not included.
Format of the date string is YYYYMMDDHHMMSS. It is allowed to insert separators like '-' or ':' to the date string and omit trailing fields. For example, the following switch is correct: -tb2001-11-20. Internally it will be expanded to -tb20011120000000 and treated as "files modified before 0 hour 0 minutes 0 seconds of 20 November 2001".
Use 'm', 'c', 'a' modifiers to specify modification, creation and last access time accordingly, such as -tbc20011120 for creation time. If such modifier is omitted, modification time is assumed.
It is allowed to use several modifiers in the same switch, such as -tbmc20190215, to set the same date for all specified times. Alternatively you can add several time filtering switches to command line. By default, time filters use AND logic, so a file must match all such filters to be processed. It can be changed to OR logic with 'o' modifier, so a file will have to match at least one 'o' filter. For example, use -tbco20190201 -tbmo20190210 to include files created before 2019-02-01 or modified before 2019-02-10.