--- vim-8.2.2529/runtime/syntax/crontab.vim.orig	2021-03-02 13:31:41.344169187 +0100
+++ vim-8.2.2529/runtime/syntax/crontab.vim	2021-03-02 13:33:36.243347329 +0100
@@ -19,25 +19,34 @@
 
 syntax match crontabVar "^\s*\k\w*\s*="me=e-1
 
+syntax match crontabVar /^[A-Za-z][A-Za-z0-9\-\_]*/ nextgroup=crontabVarEq skipwhite
+syntax match crontabVarEq contained /=/ nextgroup=CrontabVarValQ,CrontabVarVal skipwhite
+syntax match crontabVarValQ contained /\(["']\).*\1/ skipwhite
+syntax match crontabVarVal contained /["']\@!\S\+/ skipwhite
+
 syntax case ignore
 
-syntax match crontabMin "^\s*[-0-9/,.*]\+" nextgroup=crontabHr skipwhite
-syntax match crontabHr "\s[-0-9/,.*]\+" nextgroup=crontabDay skipwhite contained
-syntax match crontabDay "\s[-0-9/,.*]\+" nextgroup=crontabMnth skipwhite contained
+syntax match crontabMin "\_^[0-9\-\/\,\.]\{}\>\|\*\(/[0-9]\{}\)\?" nextgroup=crontabHr skipwhite
+syntax match crontabHr  "\_^[0-9\-\/\,\.]\{}\>\|\*\(/[0-9]\{}\)\?" nextgroup=crontabDay skipwhite contained
+syntax match crontabDay "\_^[0-9\-\/\,\.]\{}\>\|\*\(/[0-9]\{}\)\?" nextgroup=crontabMnth skipwhite contained
 
-syntax match crontabMnth "\s[-a-z0-9/,.*]\+" nextgroup=crontabDow skipwhite contained
+syntax match crontabMnth "\<[a-z0-9\-\/\,\.]\{}\>\|\*\(/[0-9]\{}\)\?" nextgroup=crontabDow skipwhite contained
 syntax keyword crontabMnth12 contained jan feb mar apr may jun jul aug sep oct nov dec
 
 syntax match crontabDow "\s[-a-z0-9/,.*]\+" nextgroup=crontabCmd skipwhite contained
 syntax keyword crontabDow7 contained sun mon tue wed thu fri sat
 
+syntax match crontabSpecial  "@\w\+" nextgroup=crontabCmd skipwhite
+syntax match crontabCmdSpecial contained /\\.\|%/
 syntax region crontabCmd start="\S" end="$" skipwhite contained keepend contains=crontabPercent
+syntax region crontabCmd start="\S" end="$" nextgroup=crontabCmnt skipwhite contained contains=crontabCmnt,crontabCmdSpecial keepend
 syntax match crontabCmnt "^\s*#.*" contains=@Spell
 syntax match crontabPercent "[^\\]%.*"lc=1 contained
 
 " Define the default highlighting.
 " Only when an item doesn't have highlighting yet
 
+hi def link crontabSpecial		PreProc
 hi def link crontabMin		Number
 hi def link crontabHr		PreProc
 hi def link crontabDay		Type
@@ -59,6 +68,13 @@
 " comment out next line for to suppress unix commands coloring.
 hi def link crontabCmd		Statement
 
+hi def link crontabCmdSpecial	Special
+
+hi def link crontabVar		Identifier
+hi def link crontabVarEq		Special
+hi def link crontabVarVal		Constant
+hi def link crontabVarValQ		String
+
 hi def link crontabCmnt		Comment