How do you know when we switch from EST to EDT?

What's the difference? EDT vs. EST

What is the TZ value for EST?

Is EST a time zone?

Are we currently on EST?

What is the difference between EST and EDT in time zones?

Time Zones and the Coordinated Universal Time

Brief Explanation of USA Time Zones (EST, CST, MST, PST, Alaska & Hawaii)

How many time zones are there in Sydney?

What time zone is used in Sydney?

What is 2pm EDT in EST?

Is GMT 4 the same as EST?

Are we EST or EDT?

Converting Central Time to Eastern Time with DST Adjustments in Python Pandas

Just store UTC? Handling Time Zones & Daylight Saving

Where is PST time zone?

Handling Time Zones and Daylight Saving Time in SQL Server

What is Sydney time zone called?

What is the local timezone in NSW?

Where Does The Eastern Time Zone Start In Florida? - Southern Culture Collective