In Jain tradition, navkārsi time = 48 minutes after local sunrise. Today (10 March 2026) in Palitana, sunrise is around 6:51 am, so navkārsi is approximately:

≈ 7:39 am (local time)

You should not eat or drink anything before this time. If you are near a derasar/upāshraya, please also check their daily pachchāng board, as local sangh sometimes follows a specific printed timetable rounded to the nearest 5 minutes.