EST stands for Eastern Standard Time. It is always UTC-5.
EST is standard time. While daylight saving time is in effect, the same areas use EDT (UTC-4) instead.
Right now New York uses EDT (UTC-4), not EST.
Where EST is used
Bahamas, Canada, Cayman Islands, Haiti, Jamaica, Mexico, Panama, United States.
In some of these countries EST is used only in part of the country or only part of the year.