Mughdhar Yog is considered a bad and inauspicious period in Hindu astrology. This yog is calculated based on nakshatra or birth star. The time period of Mugdhar Yog is till the nakshatra on the particular day.
Mughdhar Yog time period is to be avoided for travels, exams and financial dealings. The time is also not good for the first meeting with a person or family. All kinds of investments, openings etc should be avoided during the time period.
Mughdhar Yoga happens when -
Magha or Makam nakshatra falls on Sunday or Ravivar
Chitra or Chithirai or Chithira nakshatra falls on Monday or Somvar
Jyeshta or Kettaior Triketta nakshatra falls on Tuesday or Mangalvar
Abhijit nakshatra falls on Wednesday or Budhwar
Purvabhadrapada or Pooruruttathi nakshatra falls on Thursday or Guruvar
Bharani nakshatra falls on Friday or Shukravar
Ardhra or Arudhara or Thiruvathira nakshatra falls on Saturday or Shanivar.
Mughdhar Yog is present only when the corresponding nakshatra is present on the particular day of a week. The yog ends on the day when the nakshatra period ends.