Why we do Gauri Avahan during a Specific Time (Muhurat)? Is there any special reason related to science / astrology / numerology / spiritual practice?
According to the Scriptures, the Time (Muhurat) of invocation of Gauri (Gauri Avahan) is pre-determined. Gauri Avahan should be performed during that time only.
The principle of a specific deity comes on to the Earth in higher proportion during a specific time mentioned in the Scriptures.
Gauri Avahan during the pre-determined time by the Scriptures makes the Principle frequencies of the Devi to bless the venue and the performers in a higher note for a longer period.
Similar to this, Gauri Visarjan time is also pre-determined but Avahan is the major event for Gauri Pujan hence the higher importance is given for invocation rather than immersion.