Getting Current Day in Cache

Answer by Dmitry Maslennikov 5 December 2017

Look at the documentation, there are some formats available to use in the $zdate function. Where 11 (abbreviated) and 12(full) looks like what you need.

write $zdate($h, 11)
Tue

Write $zdate($h, 12)
Tuesday

Comment by Alexey Maslov 6 December 2017

Just 2c to add. If a "national" locale is effective, e.g.

%SYS>zw ^%SYS("LOCALE","CURRENT")
^%SYS("LOCALE","CURRENT")="yruw"

and the setting was done before Caché restart:

%SYS>set ^SYS("NLS","Config","LocaleFormat")=1

you will get your national day name if don't forget to set localeopt=0, e.g.

USER>f localeopt=0,1 w localeopt," ",$ZD($h,12,,,,,,,,localeopt),!
0 Среда
1 Wednesday

It's also possible to achieve the same overriding format defaults for the current process (see $ZDATE description for details). I emphasized the need in Caché restart just because didn't find it in docs.

Comment by Dmitry Maslennikov 6 December 2017

For current process

USER>f fmt="enuw","rusw","current","" do ##class(%SYS.NLS.Format).%New(fmt) w !,fmt,?10,$zd($h,11),?15,$zd($h,12)
 
enuw      Wed  Wednesday
rusw      Сре  Среда
current   St   středa
          Wed  Wednesday

Or for all new processes, without restart

%SYS>write $zd($h,12)
Wednesday
%SYS>Set ^SYS("NLS","Config","LocaleFormat")=1
 
%SYS>write $zd($h,12)
Wednesday
%SYS>Do Locale^NLSLOAD("rusw")
 
%SYS>write $zd($h,12)
Среда

Comment by Alexey Maslov 7 December 2017

This option:

$ZD($h,12,,,,,,,,localeopt)

seems to be more safe as switching the default representation for $ZD($h,12) may ruin already existing functionality that is expecting English days' names.

To be honest, I'd prefer application level localization, just because not all possible languages are supported by Caché.

Getting Current Day in Cache

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