This guide is for anybody that has a whole bunch of files, be they photos, MP3s, documents or any other type of file you have that needs quick-sorting by date at a glance.

There is only one right way to put the date in a file name. When I say "date in a file name" I mean that the actual title of the file has the date in it.

The format you must use for proper date formatting every time is:

1. Four-digit year
2. Dash
3. Two digit month or single digit month with leading zero
4. Dash
5. Two digit day of month or single digit day of month with leading zero
6. Underscore
7. Description of file in lowercase letters with words separated by underscores (optional, but more compliant)

Here’s an example:

2009-03-27_my_document.doc

Now I’m going to explain why this is the proper date formatting structure for file names.

Four-digit year

You do this so as not to confuse a year with a month. If you have a date written as 08-07-08, is that August 7, 2008 or 8 July, 2008? You can’t tell.

"That doesn’t matter, I always use month/day/year."

It does matter because not everybody uses month/day/year.

Two digit month or single digit month with leading zero

A two digit month is each enough to understand. For example, December is 12.

A single digit month, like May, is 5. But you don’t write it like that. You add in a leading zero so it’s written as 05.

Why?

Because some operating systems will not list files in proper numeric order without the leading zero. Windows XP and all previous versions prior to it do this.

Example: You have 10 DOC files from 0 to 10. The single digits have no leading zeroes on them.

This will show in XP in Windows Explorer as:

0.doc
1.doc
10.doc
2.doc
3.doc
4.doc
5.doc
6.doc
7.doc
8.doc
9.doc

Note the 1 and the 10 are right on top of each other. Why does XP do this? Because 1 comes after 0, before 2 and all other numbers. XP is only going by the first character it "sees."

Even Windows Vista and 7 still do this when listing files outside the Windows Explorer interface (such as a File/Open dialog box.)

Second example: 00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10

All these numbers will be listed in proper order. 0 always comes before 1, and even with the way Windows lists files, it absolutely will not get this "wrong"; that’s why you do it.

Two digit day of month or single digit day of month with leading zero

You do this for the exact same reason as for the month.

Underscore

The underscore (this character: _) is necessary because the dates uses dashes already. Using underscores gives a clean visual cue as to what’s a descriptor and what’s a date.

In addition, you use underscores because trying to send a file over the internet with a literal space in it results in a %20, or just fails on attempt to transfer. A replacement must be used for the space to avoid this. Underscore is it.

Description of file in lowercase letters with words separated by underscores

As said above, this is optional. You use lowercase just in case you ever have to upload this from a command line via FTP. Where case of letters is involved, mistakes can be made easily – especially if it’s a long file title. If you know all the letters are lowercase, this decreases typing mistakes significantly.

Why Year/Month/Day and not Year/Day/Month?

Year/Month/Day is proper big endian formatting and follows ISO 8601 international standard. Year/Day/Month does not. You can see more info here on that if you like.

Okay, so I know a bunch of stuff about date formatting in files now. Why should I care?

You should care for three good reasons.

First and most obvious, it will make your files easier to manage no matter what OS you use. And if you plan on sticking with XP for a while longer, this is mandatory because of the way it lists files starting with digits.

Second, being that the world is getting smaller every day, chances are you’ll be trading files with someone across the pond sooner or later, if not doing so already. Using the internationally recognized big endian standard eliminates any and all confusion as to what a date format truly represents.

Third, in addition to files being sorted properly no matter the OS you use, they will also sort properly no matter what web site you use. Using Windows SkyDrive, Google Docs, plain FTP or other means of online storage? You’ll be able to sort a whole lot easier using proper date formatting in the titles of your files.

Wouldn’t it be easier just to sort by date modified or date created?

Not necessarily because it can add in many repetitive steps.

In Windows (XP/Vista/7,) two columns that can be added via Windows Explorer are Date Modified and Date Created. However in order to see these, you have to be in Details view mode when looking at files.

Date Modified is usually there by default, but Date Created isn’t, so you have to add that in by right-clicking a column to see all that are available, then choose Date Created so it can be seen.

Example from Windows XP:

To get to this point, it took five clicks just to see this stuff.

1. View
2. Details
3. Right-click column
4. Date Created
5. Click to sort by date created

You may have to do this over and over again – particularly in XP – because this view mode may not be "remembered" by Windows. It can get very frustrating quickly.

Adding in the date to the title of the file eliminates the need to do any of this.

Where would using date formatting like this in file titles be most useful?

Three instances comes to mind:

1. Photos
2. Documents
3. Dated audio or video broadcasts

Is there ANY WAY to automate the process of renaming multiple files with the date like this?

Absolutely. The tool you need is Rename Master for Windows. Here’s how to use that software to modify as many files as you want – all at once – with their creation date at the front:

1. Launch Rename Master.

2. Remove all existing steps. This is done easily by clicking Edit then Clear Renaming Options, like this:

3. In RM, navigate to the folder where the files are. Do this by using the Folder Browser on the left of the application. If you don’t see it, press CTRL+B while using Rename Master.

4. Click the New Step button, then Add to Beginning/Ending, like this:

5. Add the following in: ?dc:FYYYY-MM-DD?_

Yes, I know that looks weird, but it works. It looks like this:

Make sure to select "at the Beginning" and "to the Name" as shown above.

6. Click the New Step button again and choose to Replace Name/Phrase, like this:

7. Set the step to look like this, and follow the steps carefully:

Next to "Replace the" we select phrase. This will enable the other fields.

In the field directly to the right of phrase, click inside and press the spacebar once to add in a space. You cannot see this in the screen shot above because a space obviously cannot be seen.

In the field directly to the right of with, type in an underscore (this character: _).

8. Click the Case & Wildcards tab, check Override configuration settings and tick the option for lowercase, like this:

9. Compare the Name to the New Name column to make sure the appropriate changes will be made.

Above is exactly what we want. The best example is "New OpenDocument Text.odt."

As you can see from the New Name column, it will be changed to:

2009-09-23_new_opendocument_text.odt

The file creation date is added using the proper date formatting. All spaces are replaced with underscores and letters that were capitalized are changed to lowercase.

After that it’s a click of this button:

(Located at the bottom of Rename Master)

..and that’s all there is to it.

Always remember to proceed carefully with the renaming of files, especially for large amounts of them. Pay close attention to the New Name column in Rename Master when using the software, because whatever you see there is exactly what the files will be renamed to verbatim. So if it looks wrong, it is wrong. Correct it before hitting that rename button at the bottom.

Final notes for Vista/7 users

As you know, file permissions are needed in order to rename files in specific places. RM may not function correctly if you try to modify files it doesn’t have proper access to. To overcome this, rename files that you have located either in a specific folder you create on the desktop or a specific folder you create in My Documents. RM should work without issue when renaming files from those locations. Just remember to create a specific folder to do it so you don’t rename anything else by mistake.

Well, that didn’t take long. Currently it’s being plastered all over the internet that the official Windows 7 launch date is October 22, 2009. For those of you that suck at math, that’s roughly four months from now.

Microsoft says yes (much to the gritting of teeth by many), there will be five editions. Starter, Home Premium, Professional, Enterprise and Ultimate. Chances are likely most of you will go with Home Premium or Ultimate.

For those of you that would ask, "What’s the difference between editions?", fear not because someone was nice enough to put together a chart showing what’s different between each one.

I can say that other than the absent encrypted file system and XP mode in the Home Premium edition, there really aren’t any reasons to use Professional or Ultimate. You still get all the visual perks, simple HomeGroup option for home networks and so on. So if you were torn about which one would suit you best, use Home Premium. Basic just misses too many features.

Even though a launch date is set, no price has been announced yet. This annoys me because I really want to know how much of hole in the wallet this is going to burn.

Microsoft Windows Vista Home Premium retail version currently sells for around $225 at most retailers. Yes, you can get an OEM for $99, and hopefully this will be made available on wide release of Windows 7 because I absolutely zero interest in spending over $100 more just for a pretty box and manuals. All I want is the license; the rest I can figure out on my own, thank you very much.

Those of you out there using Windows 7 RC like I am may get that option. A notice should come thru Windows Update when the RC ends stating you must update to a licensed version. Hopefully the price won’t be too stiff.

As has been said many times by many bloggers, if Microsoft decides to make this OS more expensive than Vista currently is, that would be a bad, bad maneuver in the current economic climate.

(Note before starting: This should also for work Windows Vista the exact same way.)

The way in which Windows 7 shows the date and time in the taskbar is like this:

However you can make it look like this:

Or this:

Or any number of other ways by modifying the short date format in Calendar settings.

To access this setting, you can get to it in several different ways.

Method 1 (the very long way):

1. Control Panel
2. System and Security
3. Clock, Language and Region
4. Date and Time
5. Change Date and Time (link)
6. Change Date and Time (button)
7. Change calendar settings

Method 2 (the much shorter way):

1. Right-click the clock in the taskbar.
2. Adjust date/time
3. Change date and time (button)
4. Change calendar settings

The Windows 7 date display in the taskbar does follow the short date format when adjusting the calendar settings.

Once you customize the short date, click Apply, then look to the taskbar date display to see if it’s to your liking. If not, change it around until you find something that suits you and click Apply again. When you find what you like, click OK.

I can’t tell you how happy I am that the date displays in whatever way I wish in Windows 7 without having to "raise" the taskbar just to see it.

Final notes:

If you choose to specifically use small icons in the bar, the taskbar will only show the time like XP did when "one tier" high.

If you mess up the way the time/date is displayed for whatever reason, note the Reset button in the screen shot above. This will restore the default appearance if you need to start over again.