Category
page 1Time measurement systems
clock
thumb|An analog pendulum clock made around 18th century
lunar calendar
type of calendar, based on observations of the lunar cycle
solar calendar
type of calendar
water clock
timepiece in which time is measured by the flow of liquid into a vessel
ISO 0070
International standards for dates and times
ship's bell
bell made for use on a ship
Unix time
system for identifying instants in time; the number of seconds that have elapsed since the UTC midnight before 1 January 1970, ignoring leap seconds
12-hour clock
time counting system, divided into two parts: AM and PM
24-hour clock time
timekeeping convention
watch system
thumb|upright=1.3|A sailor keeps watch aboard .|alt=
Watchkeeping or watchstanding is the assignment of sailors to specific roles on a ship to operate it continuously. These assignments, also known at sea as watches, are constantly active as they are considered essential to the safe operation of the vessel and also allow the ship to respond to emergencies and other situations quickly. These watches are divided into work periods to ensure that the roles are always occupied at all times, while those members of the crew who are assigned to work during a watch are known as watchkeepers.
Swatch Internet Time
unique form of time zoning by watch maker Swatch for the connected world
metric time
measurement of time intervals in base-10 multiples of seconds
decimal time
time of day in decimal units
Hindu units of time
concept of time in Hinduism
binary clock
clock that displays the time of day in a binary format
Six-hour clock
Thai timekeeping system
shot clock
basketball rule
time of flight
time taken by an object, particle or wave (be it acoustic, electromagnetic, etc.) to travel a distance through a medium
Chinese double hour
ancient Chinese time unit, 12 double-hour periods
moment
medieval unit of time; equals 1/40 of a medieval hour, i.e. 1/480 of the time interval between sunrise and sunset
six-hour clock face
clock face with time numbered 1 to 6
time server
server that reads actual time information and distributes it
Muhurta
Muhūrta () is a Hindu unit of time along with nimiṣa, kāṣṭhā, and kalā in the Hindu calendar.
hexadecimal time
time notation using base 16 instead of base 60
Roman timekeeping system
hour system where a day is divided into 24 hours: 12 hours of light and 12 (different) hours of darkness
Relative hour
Hebrew term ascribed to an hour of a 12-hour day and how it is to be reckoned
lantern clock
Pitch clock
pitch clock is used in various levels of baseball to limit the amount of time a pitcher uses before he throws the ball to the hitter
Byzantine time
timekeeping system in which 0:00:00 begins daily at sunset rather than midnight
Catalan time system
traditional manner in which to tell time in Catalan