Standard Time:
Standard time refers to the time used by a particular region or country as a reference for setting clocks and coordinating activities. It is typically based on the mean solar time at a specific longitude, known as the standard meridian. Standard time is used to ensure uniformity and facilitate communication and scheduling across different regions.

Local Time:
Local time, on the other hand, is the actual time observed in a specific location. It is determined based on the position of the sun in the sky and can vary from one place to another, even within the same country. Local time is influenced by factors such as the longitude, latitude, and time zone of a particular location.

Difference between Standard Time and Local Time:
1. Definition:
- Standard time is a reference time used by a region or country as a basis for timekeeping and coordination.
- Local time is the actual time observed in a specific location, determined by factors such as the position of the sun and the geographical location.

2. Basis of Determination:
- Standard time is typically based on the mean solar time at a specific longitude, known as the standard meridian.
- Local time is determined by the position of the sun in the sky, which varies based on the longitude and latitude of a location.

3. Variation:
- Standard time remains constant within a particular time zone and is used as a reference across a region or country.
- Local time can vary from one location to another, even within the same time zone, due to differences in longitude and latitude.

4. Purpose:
- Standard time is used to ensure uniformity and facilitate communication, scheduling, and coordination across different regions.
- Local time is used for day-to-day activities, such as setting clocks, organizing events, and determining business hours.

5. Time Zone:
- Standard time is typically associated with a specific time zone, which covers a range of longitudes and is defined by the standard meridian.
- Local time varies within a time zone, as it is influenced by the specific longitude and latitude of a location.

6. Adjustments:
- Standard time may require adjustments, such as the implementation of daylight saving time, to account for seasonal variations and optimize energy usage.
- Local time does not undergo significant adjustments, as it is primarily based on the position of the sun and the geographical location.

In conclusion, standard time is a reference time used for coordination and uniformity, while local time is the actual time observed in a specific location. Standard time is constant within a time zone, based on the mean solar time at a specific longitude, while local time can vary due to differences in longitude and latitude.