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.
Many writers express their displeasure at putting a comma after the year when the expression serves as an adjective, because it looks funny.. Perhaps so. But this seems to be the rule, and it does make sense. The year is serving in apposition to the month and day, and thus requires commas before and after it.