+**21c** refers to the [21st Century](/wiki/21st_Century), the present century in the [Gregorian calendar](/wiki/Gregorian_calendar). It marks a period defined by rapid technological advancement, global interconnectedness, and evolving societal paradigms.
+## See also
+- [Digital Age](/wiki/Digital_Age)
+- [Globalization](/wiki/Globalization)
+- [Future Studies](/wiki/Future_Studies)