India has a long history of scientific and technological participation. India served as a global knowledge hub. The best examples are the universities of Nalanda (fifth century AD in Bihar) and Takshshila (tenth century BCE). From the fifth century CE to 1200 CE, they served as a center of learning. Since ancient times, India has played an important role in science and technology. Several historical references demonstrate India's scientific contributions in various domains, such as Sushruta in medical science, Koutilya in arthashastra, and Aryabhatta in mathematics and Astrology. Similarly, in the fields of Timekeeping India has great scientific contributions which are not known to the masses. Since the Vedic time, India had its timekeeping method. Massive architectures like Konark Surya Mandir of Odisha, or Jantar-Mantar at Jaipur support these claims. This paper explores the timekeeping details in the best possible way from pre-Vedic/Vedic times and its progression in the form of atomic Timescale as UTC till date.

印度的科技参与历史悠久。印度是一个全球知识中心。最好的例子是那烂陀大学（公元五世纪在比哈尔邦）和塔克什希拉大学（公元前十世纪）。从公元 5 世纪到公元 1200 年，它们是一个学习中心。自古以来，印度就在科技领域发挥着重要作用。一些历史文献证明了印度在各个领域的科学贡献，例如医学科学中的 Sushruta、arthashastra 中的 Koutilya 以及​​数学和占星术中的 Aryabhatta。同样，在计时领域，印度也有不为大众所知的巨大科学贡献。自吠陀时代以来，印度就有了自己的计时方法。奥里萨邦的 Konark Surya Mandir 等大型建筑，斋浦尔的 Jantar-Mantar 或 Jantar-Mantar 支持这些说法。本文以最佳方式探讨了从前吠陀/吠陀时代开始的计时细节及其以原子时标形式作为 UTC 至今的进展。