Generally, if you are in a country east of the Greenwich Meridian, your local time is ahead of GMT (e.g. local time in China is GMT +8 hours). West of the Greenwich Meridian, local time is behind ...
Enter any time in Etc/GMT and find the corresponding asia/kabul time using this Time Calculator. Etc/GMT is a UTC +00:00 timezone offset where as Philippines Time (PHT) is a UTC +8:0 timezone offset.