A geographic region that observes a uniform standard time, typically offset from UTC (Coordinated Universal Time).
A time zone keeps clocks synchronized within a region. There are 24 primary time zones, each roughly 15° of longitude wide.
Daylight Saving Time shifts clocks forward 1 hour in spring ("spring forward") and back in fall. Not all regions observe DST.
The number of seconds elapsed since January 1, 1970 (Unix epoch), used universally in computing.
A six-character alphanumeric code representing a color in RGB format, widely used in web design.
A measure of how far a vehicle can travel on a unit of fuel, typically expressed as miles per gallon (MPG) or liters per 100 km.
Standardized volume and weight units used in recipes, including teaspoons, tablespoons, cups, ounces, and grams.
A numerical system indicating footwear size, varying by country (US, UK, EU, CM/JP) with no universal standard.
A layer of material (wood chips, bark, straw, or rubber) spread over soil to retain moisture, suppress weeds, and regulate temperature.