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时区(time-zone)常见问题总结

1 概念

https://github.com/sishuai/time-zone/blob/master/time-zone-concept.md

1.1 时区列表

https://www.ibm.com/support/knowledgecenter/en/SSAW57_8.5.5/com.ibm.websphere.nd.multiplatform.doc/ae/rrun_svr_timezones.html

https://en.wikipedia.org/wiki/List_of_time_zone_abbreviations

https://en.wikipedia.org/wiki/List_of_tz_database_time_zones

https://en.wikipedia.org/wiki/Lists_of_time_zones

2 经纬度换时区

给定经纬度得出时区名称具体时区UTC偏移量

https://github.com/go-utils/utils/ 的GetTimeZoneByLatlong方法(golang库)

2.1 经纬度时区ID的转换

如:

(42.7235, -73.6931)   ---->   America/New_York [Location Name]

http://efele.net/maps/tz/(不再维护),https://github.com/evansiroky/timezone-boundary-builder 提供的经纬度时区ID的转换数据(由于不同国家政治策略的变动,这个数据经常更新)

各语言的库 https://github.com/evansiroky/timezone-boundary-builder#lookup-libraries

2.2 时区ID具体夏令时偏移量的转换

如:

America/New_York + 2016年12月26日 --> UTC - 5:00

America/New_York + 2016年10月26日 --> UTC - 4:00

http://www.iana.org/time-zones 提供时区ID具体夏令时偏移量的转换数据(由于不同国家政治策略的变动,这个数据经常更新)(有golang标准库)

https://golang.org/pkg/time/#LoadLocation

https://github.com/golang/go/tree/release-branch.go1.4/lib/time

package main

import (
	"fmt"
	"time"

	"github.com/bradfitz/latlong"
)

func main() {

	location, _ := time.LoadLocation(latlong.LookupZoneName(42.7235, -73.6931))
	zone, offset := time.Now().In(location).Zone()

	fmt.Print(zone, "\n")
	fmt.Print(offset / 3600)
}

//std out
//EDT
//-4

https://www.iana.org/time-zones/repository/tz-link.html

https://www.iana.org/time-zones/repository/releases/tzdb-2017b.tar.lz

https://github.com/eggert/tz

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