If this setting is enabled the minimum number of nights will be multiplied every time this is passed. For example if you want to force the Arrival day to Saturday and the Departure day must still be on Saturday, you have to set the Minimum Number of Nights to 7 and if this setting is enabled, 8, 9, 10, 11, 12 and 13 nights of stay will not be allowed but only 14, 21, 28 etc. nights will be allowed. This is useful if you want to give your rooms only for weeks. The Maximum number of Nights is automatically calculated from the Rates Table of each room, infact, if a room does not have a rate for 28 nights, this room will not show up in the results so it will not be available. In case you want the calendar to force the Maximum Number of Nights for this month, set a number of MaxLOS below.