Notes: All timings are represented in 12-hour notation in local time of San Diego, United States with DST adjustment (if applicable).
Hours which are past midnight are suffixed with next day date. In Panchang day starts and ends with sunrise.
Ghatasthapana is one of the significant rituals during Navratri. It marks the beginning of nine days festivity. Our scriptures have well defined rules and guidelines to perform Ghatasthapana during a certain period of time at the beginning of Navratri. Ghatasthapana is invocation of Goddess Shakti and doing it wrong time, as our scriptures forewarn, might bring wrath of the Goddess Shakti. Ghatasthapana is prohibited during Amavasya and night time.
The most auspicious or Shubh time to do Ghatasthapana is first one third of the day while Pratipada is prevailing. If due to some reasons this time is not available then Ghatasthapana can be done during Abhijit Muhurta. It is advised to avoid Nakshatra Chitra and Vaidhriti Yoga during Ghatasthapana but those are not prohibited. The most important factor to consider is that Ghatasthapana is done before Hindu midday while Pratipada is prevailing.
DrikPanchang.com team takes care for all conditions and exceptions to find the best time to perform Ghatasthapana and we do it for 1,00,000+ cities all over the world (we also generate daily Panchangam data for 1,00,000+ cities). In other words we don't use Muhurta calculated for one city for any other city to make sure we consider all local factors like sunrise, sunset, midday, ascendant and last but not the least DST, if applicable.
You will find many sources which advise to take Choghadiya Muhurta to do Ghatasthapana but our scriptures don't advise to take Choghadiya Muhurta. DrikPanchang.com team researches all authentic sources and follows only those rules which are well documented in Vedic scriptures. However if you want to choose Choghadiya Muhurta you can take it from Choghadiya page but we don't recommend it to use for Ghatasthapana.
We also consider Lagna and try to include Dvi-Svabhava Lagna (द्वि स्वभाव लग्न) into calculated Muhurta. During Shardiya Navratri Dvi-Svabhava Lagna Kanya prevails during sunrise and if suitable we take it for Ghatasthapana Muhurta.
The factors which are prohibited for Ghatasthapana are afternoon, night time and any time beyond sixteen Ghatis after sunrise.