AddSignDays a b c (a start time, the format YYYYMMDD; B for the end time, the format YYYYMMDD; C specify the previous or the current session, C=1 the previous session and C=2 for the current session)
addSignDays ABC (A as the start time in the format YYYYMMDD; B as the end time in the format YYYYMMDD; C specify the previous or current, C = 1 is the last, C = 2 for the session)
A B C addSignDays (A for the start time, YYYYMMDD; B for the end of the time, the format YYYYMMDD; C specify the last or the current, C=1 for the last, C=2 for the current)