are there meaning of days names?

Tuesday - Saturday are Norse/Germanic/Roman Gods and Sunday/Monday are named for planets.

Monday - Moon's day
Tuesday - Tiu's day ( Germanic version of Tyr, the Norse God of War/Sky)
Wednesday - Woden's day (Germanic version of Odin, Norse King of the Gods)
Thursday - Thor's day (Norse God of Thunder)
Friday - Freya's day (Norse Goddess, leader of the Valkyries)
Saturday - Saturn's day (Roman God of agriculture)
Sunday - Sun's day