2005年簽署變更，2007年變更。。。

https://www.cnn.com/2007/EDUCATION/03/07/extra.daylight.saving/index.html#:~:text=The%20U.S.%20Department%20of%20Transportation,changes%20in%20the%20United%20States.&text=Part%20of%20the%20act%20will,ends%20on%20Sunday%2C%20November%204.

 

所有跟帖： 

• 謝謝，雖然每年不同，無線電接收並同步的規程應當不變吧？不知是何標準？ -chinomango- ♂ (0 bytes) () 09/03/2020 postreply 13:34:23