Significance of Solar day
The concept of a Solar day has multiple interpretations across different disciplines. In Vastushastra, it represents the seven days of the week (Vara), crucial for planning construction activities. Vaishnavism views a Solar day as a symbol of enlightenment and divine presence in a devotee's life. In historical context, it refers to the period between two successive sunrises or midnights, divided into sixty time-units (ghatikas or nadis), used for calculating elapsed time from the start of the year (Mesha-sankranti).
Synonyms: Solar period, Sun day
The below excerpts are indicatory and do represent direct quotations or translations. It is your responsibility to fact check each reference.
Hindu concept of 'Solar day'
In Hinduism, a Solar day symbolizes enlightenment and divine presence while also marking the seven weekly Vara days, which are essential for determining auspicious timing for construction and other important activities.
From: Hayanaratna: The Jewel of Annual Astrology
(1) This is a unit of time. The text explains that the solar days of the periods should be added to the longitude of the sun to find the commencement.[1] (2) These are the units used for measuring the duration of the periods, specifically in the context of the annual and monthly calculations, and are used for establishing the civil solar equivalents.[2] (3) These are the units of time, utilized in the calculation of tasira periods, especially when considering the civil solar days of a month or year, playing a crucial role in converting astrological measurements into practical time frames.[3] (4) These are the units of time used to measure the duration of planetary periods, as specified within the context of the school of Devakirti and are related to the ascendant of the year.[4] (5) These represent the duration of a period in terms of days, determined through calculations involving planetary positions and constants, indicating the length of time associated with each planet.[5]
From: Tiruvaymoli (Thiruvaimozhi): English translation
(1) Symbol of enlightenment and clarity, representing the presence of the Lord in the devotee's life.[6]
From: Vastu-shastra (Introduction to Indian architecture)
(1) The seven days of the week, referred to as Vara, associated with calculating the right time for building activities.[7]
The concept of Solar day in local and regional sources
A Solar day is defined as the period between two successive sunrises or midnights, used for civil timekeeping and measuring elapsed time from the year's start, divided into sixty time-units called ghatikas or nadis.
From: History of Science in South Asia
(1) These are civil days, used to calculate the elapsed time from the start of the year (Mesha-sankranti) to a particular date and time.[8] (2) This is the time between two successive sunrises or midnights, conventionally divided into sixty equal time-units called ghatikas or nadis.[9]