Bulgaria uses Eastern European Time (EET), which is UTC+2 during Standard Time, and Eastern European Summer Time (EEST), UTC+3, during Daylight Saving Time.

Bulgaria observes Daylight Saving Time. The clocks are set forward by 1 hour in the summer, shifting from UTC+2 (EET) to UTC+3 (EEST).

The time difference between Bulgaria and the United States varies depending on the U.S. time zone. For example, Bulgaria is 7 hours ahead of Eastern Standard Time (EST) and 10 hours ahead of Pacific Standard Time (PST). During Daylight Saving Time, Bulgaria is 6 hours ahead of EST and 9 hours ahead of PST.

Yes, Bulgaria shares its time zone (EET/EEST) with several other Eastern European countries, including Greece, Romania, and Turkey. This time zone is common across much of Eastern Europe.