terminal rule,why can't it match TIME or DATE

[zrwsmd]

why can't it match TIME or DATE,a little weird,lower case time or date can match correctly,is it because keyword or something?

full langium file is below simple.txt
simple.txt

PROGRAM main
  VAR
    a:date;
    b:time ;
    c:DATE;
d:TIME;
e:Date;
f:DAte;
  END_VAR

[zrwsmd]

write like this seems works well

[msujew]

Hey @zrwsmd,

I'm a bit confused, the grammar you've linked works well for me, see here.