A panchang describes a day through five limbs (panch-anga): tithi, vaar, nakshatra, yoga and karana. All five are worked out from where the Moon and Sun are in the sky, so they change every day and do not always line up neatly with sunrise. That is why festivals and vrats are fixed by the tithi, not by the calendar date — and the tithi has to be read from a panchang. This site's today's panchang shows these same five limbs and timings for a Maharashtra reference.