You can quickly check the current time difference between the US and Europe by viewing the current time zone at the top right of both countries. time zone clocks . clock symbols info

For ex. New York -5h versus to Paris +1h, there is a difference of 6 hours, so New York is always 6 hours behind Paris in standard time.
New York, US and Paris, Europe coincide in standard time from the first Sunday of November (End of US Daylight Saving Time) until the 2nd Sunday of March of the following year. (Start of US Daylight Saving Time).

You can also refer to the 4 Time Zone Colors = Intervals that are multiples of 4 hours between the same colors.
For example, between Los Angeles, California, US and London, England, UK (both in pink) the time difference (in standard time or both with DST), will be Los Angeles 8 hours behind London, UK.

Time change and time difference New York, USA vs. Paris, Europe

• As of (2nd Sunday in March) with the start of US daylight saving time, New York is -4h, and Paris is +1h, so New York will be 5 hours behind Paris.

• As of (last Sunday in March) with the start of daylight saving time in Europe, Paris is +2h and New York -4h, so New York will be 6 hours behind Paris.

• As of (last Sunday in October) with the return to Europe standard time, Paris is +1h and New York -4h, so New York will be 5 hours behind Paris.

• As of (1st Sunday in November) with the return to US standard time, New York is -5h and Paris +1h, so New York will be 6 hours behind Paris.

US and Europe, current time and time zone.