Is this calendar based on solar time ?

Yes. This is a standard solar calendar but which also shows the Hebrew months and days; Jewish holidays; new moons. You can easily see a sample page along the left column of the product page. It's beautiful and we love it.

does it have the auto sleep/wake up feature?

You can set the time you want it to go to sleep also you can set it to recognize your face movement for wake up feature (if you want a built in alarm for sleeping then you must download app) Very Good Android Tablet Very responsive has built in Hotspot nice feature :)

BPC Utilites Cervical Neck Traction Device for Instant Neck Pain Relief [FDA Approved] - Adjustable Neck Stretcher Collar for Home Traction Spine Alignment (White)

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