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An aircraft takes-off from airport A (N33°56’, W118°24’) (UTC -7 hours) at 21:15 Standard Time on 17th of February and after a total flight of 15 hours and 25 minutes arrives at airport B (N22°18’, E113°55’) (UTC + 8 hours). What is the Standard Time (ST) and local date when arriving at aerodrome B?
• A
13:40 ST, 18th February
• B
12:40 ST, 18th February
• C
21:40 ST, 17th February
• D
03:40 ST, 19th February

Standard Times (ST) or Zone Times are set by the government or ruling authority of a country.

• UTC take-off from airport A: ST take-off from A + UTC correction = 21:15 17th of February + 07:00 = 04:15 18th of February.
• UTC time of arrival at airport B: UTC take-off from airport A + Flight time = 04:15 18th of February + 15:25 = 19:40 18th of February.
• ST and date of arrival at airport B: UTC time of arrival at airport B + UTC correction = 19:40 18th of February + 08:00 = 03:40 19th of February.

NOTE: Always go through UTC for safer calculations.

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