Istanbul to Old Basing Time Converter
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Quick answers
Selected conversion
3:00 pm15:00 TRT (UTC+3), Nov 2, 2026 = 12:00 pm12:00 GMT (UTC+0), Nov 2, 2026
Istanbul is 3 hours ahead of Old Basing.
How the time difference changes
For most of the year, Istanbul is 2 hours ahead of Old Basing. From Oct 25, 2026 to Mar 28, 2027, and from Oct 31, 2027 to Mar 26, 2028, Istanbul is 3 hours ahead of Old Basing.
For most of the year, working hours of 9:00 am to 6:00 pm in Istanbul correspond to 7:00 am to 4:00 pm in Old Basing. At other times of the year, working hours of 9:00 am to 6:00 pm in Istanbul correspond to 6:00 am to 3:00 pm in Old Basing.For most of the year, working hours of 09:00 to 18:00 in Istanbul correspond to 07:00 to 16:00 in Old Basing. At other times of the year, working hours of 09:00 to 18:00 in Istanbul correspond to 06:00 to 15:00 in Old Basing.
Compare Istanbul time with Old Basing time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
TRT (Turkey Time) is 3 hours ahead of GMT (Greenwich Mean Time).
3:00 pm15:00 in Istanbul, Turkey is 12:00 pm12:00 in Old Basing, United Kingdom
Istanbul to Old Basing call time
Best time for a conference call or a meeting is between 12pm-6pm12:00-18:00 in Istanbul which corresponds to 9am-3pm09:00-15:00 in Old Basing
3:00 pm15:00 TRT (Turkey Time) (Istanbul, Turkey). Offset UTC +3:00 hours
12:00 pm12:00 GMT (Greenwich Mean Time) (Old Basing, United Kingdom). Offset UTC 0:00 hours
3:00 pm15:00 Istanbul, Turkey / 12:00 pm12:00 Old Basing, United Kingdom
Choose an hour to update the converter. Day labels such as “next day” or “+1” are relative to the selected date in the first column. Use Up and Down arrow keys, Home or End to move between hours, then Enter or Space to select.
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Istanbul Time Zone and Facts
Time Zone
Istanbul Facts
Old Basing Time Zone and Facts
Time Zone
BST – British Summer Time, UTC+1 (daylight saving time)