
54
Appendix B
Time Offset
Chart
The table below gives approximate UTC time offset for various longitudinal zones.
If you are in a time zone with daylight savings, add one hour to the offset.
A simple way to determine your local time offset is how many hours you are behind
or ahead of UTC (also called ‘Greenwich’ or ‘Zulu’ time) Example: EST (Eastern
Standard Time) is 5 hours behind UTC, so your offset would be -5. Adding one hour
for daylight savings would make EDT (Eastern Daylight Time) -4. Subtract an hour
for each time zone as you travel west.
Offsets for Continental U.S. would be:
EST: -5
EDT: -4
CST: -6
CDT: -5
MST: -7
MDT: -6
PST: -8
PDT: -7
Longitudinal Zone Offset
W180.0° to W172.5°
-12.00
W172.5° to W157.5°
-11.00
W157.5° to W142.5°
-10.00
W142.5° to W127.5°
-09.00
W127.5° to W112.5°
-08.00
W112.5° to W097.5°
-07.00
W097.5° to W082.5°
-06.00
W082.5° to W067.5°
-05.00
W067.5° to W052.5°
-04.00
W052.5° to W037.5°
-03.00
W037.5° to W022.5°
-02.00
W022.5° to W007.5°
-01.00
W007.5° to E007.5°
-00.00
Longitudinal Zone Offset
E007.5° to E022.5°
+01.00
E022.5° to E037.5°
+02.00
E052.5° to E067.5°
+03.00
E067.5° to E082.5°
+04.00
E082.5° to E097.5°
+05.00
E097.5° to E112.5°
+06.00
E112.5° to E122.5°
+07.00
E122.5° to E127.5°
+08.00
E127.5° to E142.5°
+09.00
E142.5° to E157.5°
+10.00
E157.5° to E172.5°
+11.00
E172.5° to E180.5°
+12.00
Appendices