local getArgs = require('มอดูล:Arguments').getArgs  local default_error_category = "[[หมวดหมู่:หน้าที่ใช้กล่องข้อมูลรายการโทรทัศน์ที่มีวันที่ไม่เป็นมาตรฐาน]]"  local p = {}  function p.start_end_date_template_validation(frame)  local args = getArgs(frame)  local error_category = args.error_category or default_error_category   local start_date = args.first_aired or args.released  if start_date then  if not start_date:find("dtstart") then  return error_category  end  end   local end_date = args.last_aired  if end_date then  if not end_date:find("dtend") and end_date ~= "ปัจจุบัน" then  return error_category  end  end end  function p.dates(frame)  local returnval  local args = getArgs(frame)   if table.getn(args) < 2 then  if args['1'] == nil and args['2'] == nil then  return ''  elseif args['1'] == nil then  return args['2']  elseif args['2'] == nil then  return args['1']  end  end   args['1'] = args['1']:gsub("&nbsp;"," ")  args['2'] = args['2']:gsub("&nbsp;"," ")   local dmy = false  local pr1, m1, d1, y1, su1 = string.match(args['1'], '(.-)(%u%a+)%s(%d+),%s(%d+)(.*)')  local pr2, m2, d2, y2, su2 = string.match(args['2'], '(.-)(%u%a+)%s(%d+),%s(%d+)(.*)')  if y1 == nil then  dmy = true  pr1, d1, m1, y1, su1 = string.match(args['1'], '(.-)(%d%d?)%s(%a+)%s(%d+)(.*)')  pr2, d2, m2, y2, su2 = string.match(args['2'], '(.-)(%d%d?)%s(%a+)%s(%d+)(.*)')  end   local dash = '&nbsp;–<br />'  if y1 ~= nil and y2 ~= nil then  su1 = su1 or ''  su2 = su2 or ''   local MONTHS = {January=1, February=2, March=3, April=4, May=5, June=6, July=7, August=8, September=9, October=10, November=11, December=12}  local diff = os.time({year=y2, month=MONTHS[m2], day=d2, hour=0, min=0, sec=0}) - os.time({year=y1, month=MONTHS[m1], day=d1, hour=0, min=0, sec=0})   if diff < 0 then  returnval = 'ช่วงวันที่ไม่ถูกต้อง'  else  if y1 == y2 then  if dmy == false then  returnval = pr1 .. m1 .. ' ' .. d1 .. su1 .. dash .. pr2 .. m2 ..' '.. d2 ..', '.. y2 .. su2  else  returnval = pr1 .. d1 .. ' ' .. m1 .. su1 .. dash .. pr2 .. d2 .. ' ' .. m2 .. ' ' .. y2 .. su2  end  else  if dmy == false then  returnval = pr1 .. m1 .. ' ' .. d1 ..', '.. y1 .. su1 .. dash .. pr2 .. m2 .. ' '.. d2 .. ', ' .. y2 .. su2  else  returnval = pr1 .. d1 .. ' ' .. m1 ..' '.. y1 .. su1 .. dash .. pr2 .. d2 .. ' '.. m2 .. ' ' .. y2 .. su2  end  end  end  else  returnval = args['1']..dash..args['2'];  end   return returnval; end  return p