Mr. maintainers:
        Hello! I am very glad to write this email to report my problem.
        When I am running commond on my server： 

~>date  -d "1940-06-01" +"%Y-%m-%d"
date: invalid date ‘1940-06-01’

but the other commond works right：
sense3:~>date  -d '1939-06-01' +"%Y-%m-%d"
1939-06-01
sense3:~>date  -d '1940-06-02' +"%Y-%m-%d"
1940-06-02
sense3:~>date  -d '1940-05-31' +"%Y-%m-%d"
1940-05-31
sense3:~>date  -d '1940-07-02' +"%Y-%m-%d"
1940-07-02
sense3:~>date  -d '1940-07-01' +"%Y-%m-%d"
1940-07-01
sense3:~>date  -d '1940-05-01' +"%Y-%m-%d"
1940-05-01


    my server's version and date version is：
~>uname -a
Linux zenglab 3.10.0-957.12.1.el7.x86_64 #1 SMP Mon Apr 29 14:59:59 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
~>date --version
date (GNU coreutils) 8.22
Copyright (C) 2013 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
        Written by David MacKenzie.

    This error makes my program woking wrong. Hope for your reply.

    Thank you!




 张志敏 技术工程师                                                            
单位：中国科学院大气物理研究所 大气科学和地球流体力学数值模拟国家重点实验室（LASG）
地址：中国北京市朝阳区德胜门外祁家豁子华严里40#，北京，100029          
邮箱：zhangzhimin@mail.iap.ac.cn
电话：13391835740