Datetime format?

[zoujiaqing]

On Thursday, 18 January 2024 at 23:43:13 UTC, Jonathan M Davis 
wrote:
> On Thursday, January 18, 2024 4:26:42 PM MST zoujiaqing via 
> Digitalmars-d- learn wrote:
>> ```D
>> import std.datetime : Clock, format;
>> import std.stdio : writeln;
>>
>> void main()
>> {
>>      auto currentTime = Clock.currTime;
>>
>>      auto formattedTime = currentTime.format("%Y-%m-%d 
>> %H:%M:%S");
>>
>>      writeln("Formatted Time: ", formattedTime);
>> }
>> ```
>
> std.datetime does not currently support custom date/time 
> formats. It only supports the ISO format, the ISO Extended 
> format, and Boost's simple time format.
>
> // e.g. 20240118T163806.5813052
> auto iso = time.toISOString();
>
> // e.g. 2024-01-18T16:38:06.5813052
> auto isoExt = time.toISOExtString();
>
> // e.g. 2024-Jan-18 16:38:06.5813052
> auto boostSimple = time.toSimpleString();
>
> So, if you want a different format, you'll either need to make 
> one yourself by calling the various properties on SysTime and 
> passing them to something like std.format's format to create a 
> string, or there are several packages on https://code.dlang.org 
> which have functions for doing custom date/time formatting.
>
> - Jonathan M Davis

Thank you for your replay.

So shame! The standard library doesn't have date formatting.

for this example "2024-Jan-18 16:38:06.5813052"
Why use Jan? no 01?
International standards should all apply numbers.
like this:
2024-01-18 16:38:06.5813052