Guru Moodam, or Guru Moudhya, is a specific period in Hindu calendars. During this period no auspicious ceremonies are held. Guru Moudhya 2018 time and date is given below: It is also known as Guru Moudyami.
Guru Moodam is from November 12, 2018 to December 10, 2018. Marriages are not performed during the period. Thus you will not find Marriage dates and other auspicious function dates in November.
The total number of days in a Guru Moodam are 28 days. Roughly a month.