我忘记了我们有时差,用英语怎么说

"Time difference" 在英语中可以说为 "time zone difference" 或 "time offset".
来源: 时差的概念始于19世纪，当时火车和电信系统的发展使得人们需要确定不同地区的时间差异。
英文例句:
"I forgot about the time difference and called you at 3am your time."
(我忘记了时差, 所以在你那里的3点钟打电话给你)
"We need to take the time difference into account when scheduling our meeting."
(我们需要在安排会议时考虑时差)
"The time difference between New York and London is 5 hours."
(纽约和伦敦之间的时差是5小时)