Usually, the date on a coin refers to the year in which it was produced.
In the US, this is so, although there are a few exceptions. Bicentennial quarters, half dollars and dollars were produced in 1975 and 1976, but in both cases carry the dual date "1776-1976". Several of the state quarters also carry a second year, usually the year in which the state in question joined the United States, as well as the year of production.
Among non-US Coins, the date is usually the year of production as well, although there have been many cases in which coins produced have a "frozen date" - the most extreme example of which is the silver Maria Theresa thaler which since 1780 has been produced (and is still produced today) with that date. Spanish coins between about 1949 and 1982 bore two dates - the year of authorization (which appeared to be the coin's date) and the actual year of production (which was usually written in tiny type on a star on the back of the coin). And of course many countries use a different dating system even when the date refers to the year of production - for example, many middle-eastern countries use the year in the Islamic calendar, and Japan uses the year of the current emperor's reign (so each time an emperor dies, the year on new coins produced is reset to the year "1" and bears the name of the new ruler).
It means that the coin was made at the Denver mint.
It means that the coin is rare. For example a 1909-S VDB cent is a key date. This coin is rare.
It is the date it was minted (made).
Please post new question with the date, denomination and the symbol you see on the coin.
It means the coin was minted in San Francisco.Note that there were lots of coins in 1909, not just "the" coin.
It means that the coin was made at the Denver mint.
It's actually an intertwined A, S, and G - the monogram of the coin's designer, the famous sculptor Augustus St. Gaudens.
Check the edge of the coin for a date.
....There is a date on the coin, the date shows when the coin was struck. Without knowing the date or the design, it is impossible to answer your question.
If I understand the question, you have a Sacagawea dollar coin with no date on the obverse (front) of the coin and you think it should have a 2000 date on it? The coin was made after 2008. From 2009 to date, the year the coin was struck in is on the edge of the coin.
All coins have a date that they were minted, so by looking at the coin carefully, you will find the date the coin was minted.
look at the date on the coin.
It is the date it was minted (made).
It means that the coin is rare. For example a 1909-S VDB cent is a key date. This coin is rare.
Please post new question with the date, denomination and the symbol you see on the coin.
Which coin? what date? post new question.
Then that coin is a error and is worth a whole lot more than a dollar First look at the edge of the coin for the date & mintmark.