李嘉鹏 wrote: > I used some script(At the end of the letter) to get a series of > date. but the script always fails at the date 1991-04-14. so I > tested the single command > date -d '1991-04-14 +1 day' > It would also fail with a error message > date: invalid date `1991-04-14 +1 day' > displayed.
Thank you for the bug report. However I am unable to reproduce it. Therefore I conclude that the problem must be related to your timezone. Because you are taking dates a midnight I am guessing that there is very likely a daylight savings time issue there. (Was Daylight Savings Time active then?) Instead, try looking at dates at noon. date -d '1991-04-14 12:00 +1 day' > I'm from china by the way, and the time zone I am in and to which > the systems were set is GMT8(or CST, China Standard Time). I am sorry that I am not familiar with those timezones. What is the time there that would allow me to recreated it on my system? Either for a TZ variable setting or a setting for /etc/localtime? For example either TZ=Americas/Denver or TZ=US/Mountain would configure my personal timezone. > I've not looked at any "Known Bugs" list because I didn't find > one. If the problem happens to appear on the list.Would you please > send me one. Please review the FAQ for date. http://www.gnu.org/software/coreutils/faq/#The-date-command-is-not-working-right_002e Bob
