The Invention or concept of the Time Machine comes from Mahakaal.

The very First Physical Time Measuring Mechanism. The Water Vessel above Shiva Lingam was actually a time measuring machine/ "Ghata Yantra" once. Very first yantra was introduced in Ujjain Mahakleshwar temple by our Scientist, Astrologer Rishi Varahamihira.

Due to the constant flow of water devotees placed it above the Shiva lingam. The Early days time was measured as per the Sun Movement. Thereafter, Water and Sand Ghatyantras were introduced. In Bharatvarsh we had these for lakh of years however it was precisely mentioned in Panchsiddhantika and SuryaSiddhanta by our Rishis. There was a small hole in the vessel for water to enter the vessel and sink into the water in a bell. These Watery movements were marked on its exterior, later as time passed, science evolved and Pendulum watches and new watches were introduced.

There are many references in our Purans about measuring Time, days so precisely that we can predict the future eclipse using Panchang.

The Vikram Samvat Calendar was no doubt introduced quite earlier compared to any other calenders.

Julian Calendar was used by other countries however their measurement was not accurate as per Tropical time so the Gregorian calendar was introduced, still, this is not so accurate in measuring time and revolution so we add 29th Feb after 4 years which is not the case with Panchang.

The balance days, times as per nakshatra are added as adhik maas/extra month which comes after every 32 months, 16 days, and 8 ghati. This year 2020 we just completed out an extra month and it's considered also as maal mass, no good work is performed however one of the only months which doesn't have Sankranti, also the only month in which we can celebrate each and every Vedic festivals which give benifitted more than 1000 times compared to other festivals.