Stata: display system date

Stata: display system date

• .di "system date:" c(current_date)
• .di "system date:" "$S_DATE"
• .di %td_CY-N-D  date("`c(current_date)'","DMY") // "` '" are not necessary
• .di %td_CY-N-D  date("$S_DATE","DMY")
• .di "system year: " year(date(c(current_date),"DMY") // w/o `' around c(current_date)
• .di "system month: " month(date(c(current_date),"DMY"))
• .di "system day:" day(date(c(current_date),"DMY"))
• .di "system year: " year(date("$S_DATE","DMY"))
• .di "system month: " month(date("$S_DATE","DMY"))
• .di "system day:" day(date("$S_DATE","DMY"))
•  more examples:
• Works ('local' with '=')
• local dd=day(date(c(current_date),"DMY"))
• local mm=month(date(c(current_date),"DMY"))
• local yy=year(date(c(current_date),"DMY"))
• log using "output_`yy'_`mm'_`dd'.log", replace
• log close
• Doesn't work ('local' without '=')
• local dd day(date(c(current_date),"DMY"))
• local mm=month(date(c(current_date),"DMY"))
• local yy=year(date(c(current_date),"DMY"))
• log using "output_`yy'_`mm'_`dd'.log", replace
• log close // invalid 'DMY' r(198)
• Works ('global' with '=')
• global dd=day(date(c(current_date),"DMY"))
• global mm=month(date(c(current_date),"DMY"))
• global yy=year(date(c(current_date),"DMY"))
• log using "output $yy-$mm-$dd.log", replace
• log close