Differen between local time standard time and time zone

Standard time is based on the 24 time zones. All clocks in a time zone are set to standard time.

Explanation:

For example, Pittsburgh and New York City are in the Eastern Time Zone. If it is 1:15 pm in one city, it is 1:15 pm in the other.

Local time takes into consideration the actual location of the sun in the sky based on the longitude. There are about 6 degrees of difference in longitude between Pittsburgh and New York City, so the sun reaches the highest point in the sky in NYC about 24 minutes earlier than it does in Pittsburgh.

Sun dials measure local time. Clocks measure standard time.