Theperiod ofduration from the firstdate of onemonth to the last date of the same month, which can thus vary from 28 to 31days in length.
1953 November, 'Erca', “Ticket Frauds in the East”, inRailway Magazine, page779:
In Calcutta, season tickets are issued only for thecalendar month, with a different colour for each month, so that this problem does not arise. The merest whisper of an idea to change Bombay to the Calcutta system brought such a howl of protest in the Press, that it was never seriously contemplated.
