1 Temporal measurement

1.1 History of the calendar
1.2 History of time measurement devices

2 Definitions and standards

2.1 World time
2.2 Time conversions
2.3 Sidereal time
2.4 Chronology

3 Religion

3.1 Linear and cyclical time
3.2 Numeric and Divine time

4 Philosophy

4.1 Time as "unreal"

5 Physical definition

5.1 Classical mechanics
5.2 Spacetime
5.3 Time dilation
5.4 Relativistic time versus Newtonian time
5.5 Arrow of time
5.6 Quantised time


[link to en.wikipedia.org]