Offset: +04 is 4 hours ahead Greenwich Mean Time (GMT) and is used in Asia
Countries: It is used in following countries: United Arab Emirates, Armenia, Azerbaijan, Georgia, Mauritius, Oman, Réunion, Russia, Seychelles
Principal Cities: The largest city in the +04 timezone is Dubai from United Arab Emirates with population about 1.137 million people. Other major cities in the area are Samara, Baku, Yerevan, Tbilisi
Daylight Saving: (+04) is not adjusted for daylight saving therefore +04 remains the same through out the year. This means, unlike some time zones where the clock is set forward by one hour every summer and backward by one hour during winter to adjust for daylight saving, remains the same
Yeghegnavan, Armenia representations, usage and related time zones
W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
+04 - basic short
+0400 - basic
+04:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
+0400 - sign character (+) followed by a four digit time providing hours (04) and minutes (00) of the offset. Indicates four hour and zero minutes time differences to the east of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
Delta - Military abbreviation for +04
D - short form of 'Delta'
IANA/Olson: Reflects +04 time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems