pytz

pytz.timezone('Asia/Shanghai').localize(1990,6,6)

Asked by qiuzhouxin

first command
pytz.timezone('Asia/Shanghai').localize(datetime.datetime(1990,1,1))
>>datetime.datetime(1990, 1, 1, 0, 0, tzinfo=<DstTzInfo 'Asia/Shanghai' CST+8:00:00 STD>)

second command
pytz.timezone('Asia/Shanghai').localize(datetime.datetime(1990,6,6))
>>datetime.datetime(1990, 6, 6, 0, 0, tzinfo=<DstTzInfo 'Asia/Shanghai' CDT+9:00:00 DST>)

third command
pytz.timezone('Asia/Shanghai').localize(datetime.datetime(2018,7,7))
>>datetime.datetime(2018, 7, 7, 0, 0, tzinfo=<DstTzInfo 'Asia/Shanghai' CST+8:00:00 STD>)

Question:
I think that the second command result should be
 'datetime.datetime(1990, 6, 6, 0, 0, tzinfo=<DstTzInfo 'Asia/Shanghai' CST+8:00:00 STD>)'

I confused that why the result happend

***the problem has been solved****
1986-1991 china have daylight saving time

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qiuzhouxin (qiuzhouxin) said : 		#1

1986-1991 china have daylight saving time