It depends on the issuing authority. The US has not devalued postage stamps since 1862, which means anything issued since then can still be used for postage. Other countries have invalidated stamps as of certain dates or events. Check with you local postal authority for specifics in other countries.
no
Date stamps are available at most office supply stores. Office Max, Office Depot and Staples all carry date stamps. Target and Walgreen's are also places to look for a date stamp.
Date stamps are popular office supplies available at many retailers and through online shops. Some companies have self-inking date stamps for as low as 9.99$ (USD). Other self-inking date stamps are priced at 19.99 - 56.00$ (USD).
The best way to find out is to go to your nearest post office. They will have the up to date prices and that is where you would have to buy your stamps.
if you mean go out as in on a date then no.
no, never
no
nope
probably,yeah.
yes, they do date. They go to prom together.
Yes they are.
The font commonly used for date stamps is typically a sans-serif font like Arial or Helvetica. These fonts are clear, easy to read, and work well for printing on small surfaces like stamps.