Under some Ext4 filesystem settings, a timestamp is limited up to
0x37fffffff (2446-05-10).
https://ext4.wiki.kernel.org/index.php/Ext4_Disk_Layout#Inode_Timestamps
> Therefore, timestamps should not overflow until May 2446.
Actually the spec fails under one of our CI environments, like:
```
1)
File.utime allows Time instances in the far future to set mtime and atime FAILED
Expected 2446 == 559444
to be truthy but was false
```
20200208T180002Z.fail.html.gz