Hours which are past midnight are suffixed with next day date. In Panchang day starts and ends with sunrise.
Traditionally Tamil Gowri Panchangam is used for checking auspicious time to start new work and avoid inauspicious timings. Due to its simplicity, Gowri Panchangam can be used for any Muhurtham.
All Gowri Panchangam timings, including Nalla Neram, are based on Gowri Panchangam table published in respected Pambu Panchangam in Tamil Nadu.
Nalla Neram is a Tamil word. Neram (நேரம்) means Time and Nalla Neram (நல்ல நேரம்) means Good Time. Favourable time periods in Gowri Panchangam are known as Nalla Neram. Nalla Neram is the time that gives fruitful results and considered auspicious in Tamil astrology.
There are five good Gowri Panchangam timings, Amirdha, Dhanam, Uthi, Laabam and Sugam to start auspicious work.
Three bad Gowri Panchangam timings, Rogam, Soram and Visham should be avoided.