function norh_gt_day,index,ints=ints

;+
; NAME:
;       norh_gt_day
;
; PURPOSE:
;       Return day (UT) of the observation
;       Internal format.
;
; CALLING SEQUENCE:
;       day=norh_gt_day(index)
;
; INPUTS:
;       index: index structure
;
; OPTIONAL INPUT KEYWORDS:
;       ints: if defined, return day and time structure
;
; HISTORY:
;       Writtern 1998-05-29 TY
;       Modified 2000-04-19 TY based on V. Grechnev's suggestion
;
;-

mx=n_elements(index)

if not keyword_set(ints) then out = index.gen.day else begin

out_el = {anytim2ints, time: long(0), day: fix(0)}
out=replicate(out_el,mx)

  out.day = index.gen.day
  out.time = index.gen.time

endelse

if mx eq 1 then out=out(0)

return,out

end