需要用到时区 setTimeZone 时总需要传入标识符用以正确修改时区，以下是标识符及其相关序号：
0 = "Africa/Abidjan"
1 = "Africa/Accra"
2 = "Africa/Bamako"
3 = "Africa/Banjul"
4 = "Africa/Bissau"
5 = "Africa/Casablanca"
6 = "Africa/Conakry"
7 = "Africa/Dakar"
8 = "Africa/El_Aaiun"
9 = "Africa/Freetown"
10 = "Africa/Lome"
11 = "Africa/Monrovia"
12 = "Africa/Nouakchott"
13 = "Africa/Ouagadougou"
14 = "Africa/Sao_Tome"
15 = "Africa/Timbuktu"
16 = "America/Danmarkshavn"
17 = "Antarctica/Troll"
18 = "Atlantic/Canary"
19 = "Atlantic/Faeroe"
20 = "Atlantic/Faroe"
21 = "Atlantic/Madeira"
22 = "Atlantic/Reykjavik"
23 = "Atlantic/St_Helena"
24 = "Eire"
25 = "Etc/GMT"
26 = "Etc/GMT+0"
27 = "Etc/GMT-0"
28 = "Etc/GMT0"
29 = "Etc/Greenwich"
30 = "Etc/UCT"
31 = "Etc/UTC"
32 = "Etc/Universal"
33 = "Etc/Zulu"
34 = "Europe/Belfast"
35 = "Europe/Dublin"
36 = "Europe/Guernsey"
37 = "Europe/Isle_of_Man"
38 = "Europe/Jersey"
39 = "Europe/Lisbon"
40 = "Europe/London"
41 = "GB"
42 = "GB-Eire"
43 = "GMT"
44 = "GMT+0"
45 = "GMT-0"
46 = "GMT0"
47 = "Greenwich"
48 = "Iceland"
49 = "Portugal"
50 = "UCT"
51 = "UTC"
52 = "Universal"
53 = "WET"
54 = "Zulu"
