Every day is associated with a Deity (God) and Energizers (these energizers are also known as Vastu Energizers).
God Day Energizers
Lord Krishna Monday Water (Jal)
Ganesh and Hanuman Tuesday Earth (Prithvi)
Vishnu Wednesday Air (Vayu)
Shiva Thursday Ether (Akash)
Laxmi Friday Nether (classical element)
Durga Saturday Spirit
Rama Sunday Fire (Agni)

These Energizers play an important role in activating your Chakras and even for Chakra Vastu. Every God is associated to a specific day which helps an individual to worship the deity on that particular day.