The time difference between ET and AK is 4 hours during Daylight Saving Time (DST) and 3 hours during Standard Time. If it is currently DST in both New York and Anchorage, then the time in Anchorage would be 11 pm when it is 3 am in New York. If it is Standard Time in both locations, then the time in Anchorage would be 12 am when it is 3 am in New York.
It's important to note that the United States observes DST from the second Sunday in March to the first Sunday in November. During this period, the time difference between ET and AK is 4 hours. For the rest of the year, the time difference is 3 hours.
Therefore, depending on whether it is DST or Standard Time, the time in Anchorage, Alaska when it is 3 am in New York would be either 11 pm or 12 am.