Is Tungsten magnetic? I dropped my boyfriends ring (made of Tungsten) down the place in the doorframe where the door closes, not knowing there was actually a hole there.
Use commas to separate things in a list or series. If you have a series of three or more items, use commas to separate each item. Do not place commas before or after the list or series. Do not use commas when all the items in a series are linked by and, or, or nor.
The date isn't enough of a dramatic statement to merit dashes, and if you want to leave it in, another good reason to use parentheses is that the date already contains a comma between the day and the year, so to surround it with commas would make the sentence difficult to read.