How do I get the dat stamp to appear

The date stamp setting is in the recording menu. See "Using the [REC] Menu" section beginning on page 91 of this manual. The date stamp is described on page 110.

Seeing the Date When Previewing images

• The camera records the date and time of each photo in the metadata attached to each picture. You have the option to see the date and time when when the camera is in "Playback" mode, which allows you to preview your images on the screen. When looking at your pictures, use the "Disp/Back" button to include text with your pictures. The date and time will appear along the bottom of the image.
  
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Printing the Date on Pictures

• Users can include the time and date on their prints from the "Mode" menu by choosing "Print Order" with the "With Date" option.
  

You can stamp the date onto the picture after it's taken (the date will be the date the picture was taken, not the date it was stamped) by using the "Text Stamp" feature. Full details are in the "Text Stamp" section of the manual (page 90 in my copy). If you need a manual, you can download one at
http://service.us.panasonic.com/OPERMANPDF/DMCZS1.PDF

The camera does not have a feature for stamping dates onto the photographs, but the information is stored with every picture. Just about any photo viewing program should be able to display it. Depending on the program and printer, you can choose to print the date on the picture, in the margins, or on the back. Please refer to the documentation for whatever program you use to print.

In any mode, press the MENU button. Use up/down to highlight Setup (three horizontal sliders) and press the OK button. Use up/down to highlight "Date Stamp" and press OK. Make your choice and press OK. The date stamp will only appear on photos taken in the auto mode.

The date and time (and a lot more) are stored with every picture in its EXIF metadata. Any photo viewing/editing program should be able to display this data. To print this data, please consult the documentation for whatever program you're using to print your pictures. Depending on the program and printer you may print the date on the image, in the margins, or on the back.

Only if the date and time stamp was used while the pictures were being taken and appear on the pictures when previewed

Turning the date stamp off will only work for future pictures you take...The only way to remove the date on the pictures you have already taken is to do a crop or photshop the area...

you can only do date and time stamp under function button go to bottom where you can change size of pictures -go to right to W or wide-this is only setting you can do date time stamp on-when you change pic size and go back to menu you will see it highlighted and you can now turn it on-equals about a 2-3 megapixel size picture only-also just leave settings alone and have printer add it-date and time our always in pic data and most printers can add it

Please spend some time in the menu item referring date stamp, date,record,time if you catch off that item.
For taking 3 pics ,You might have switched on the MULTI in the menu in camera or shooting mode