Tiredmummyoftwo. Moondog set out the calendar principle in November 2008. You could search under "lingle" and "calendar" but it was a long and emotional thread. So instead I've cut moondog's key post from 28thNov. at 18.00 and am pasting it here below:
"With understanding the concept of time, I have found a simple calendar invaluable. I
like this one as the spaces for the days are nice and big
Organised Mum calendar
Here is what to do.
Start at the begining of a month. For about 3 weeks, simply get the child to cross off the relevant day of the month with a big cross from each corner of the box. Do it before bed and tell (sign and speech) them the day is finished.
They should start getting the idea of the page filling up (ie time passing).
You can then start putting in pictures depicting important future events (eg parties, swimming, cinema trip,Christmas) What is nifty about this calendar is that it comes with lots of little activity stickers. I also make my own from Widgit Writing with Symbols package or Google Images or digital photos or drawings. Keep it simple to begin with.
Gradually (it may take months, that's ok, important thing is to do it every day)the child will realise that the event is coming closer. Also good for left to right skills and counting (eg Our big thing is dh coming home from his work in Bangladesh so there is a picture of a plane about 4 weeks from now and every night we count. Same with Christmas.)
You can then start to ask the child what happened that day when they are crossing off the day at night. Whatever they come up with is fine (eg even just something like 'sandpit') Honour their contribution and draw a little picture (or find a suitable one) to put in the box for that day and then cross it out.Even if the child is not able to communicate something, you can pick out something important from theri day and put in a picture (eg for my kids today, it would be playing and putting make up on hideous Barbie heads at child minders.
You don't have to have a picture for every day . Sometimes a cross may be enough. Equally though, put in the box anything of importance (eg for us it may be a tag from a special treat box of cereal or cinema tickets or a photo of something we made.)
You can then add a simple code to denote school/non school days. Iuse a red sticky dot (buy sheets of them in WHSmith)and put it in top right hand corner of every box which denotes a non school day.
If they start writing, you can transition to that (although even if they do, everyone loves pictures.) Ihave done this every night for 4 years and my children love it. Dd often goes to bed with a stack of calendars and flicks through them, enjoying reflecting on past events (eg holidays, the time she was sick on her sohes, the night a fox ripped open the rubbish bags, the days we went to the cinema.)
I want everyone in the world to do this. "
Moondog also highly recommends a "Timetimer" which you can get from timetimer.com.
Moondog also writes often about how visual aids are misunderstood and therefore either misused/used without being updated to reflect progress/abandoned. Reading the "Visual Aids" book should help you combat that for your child.
lastly, I have had great success dividing my kitchen clock into segments and colour-coding them to show morning, afternoon and evening. Search lingle or linglette +clock (apparently an IKEA clock for £1.99 works well for this.....)