How to Set Date Time from Mac Command Line
Working on a web extension that ships to an app store and isn't immediately modifiable, like a website, can be difficult. Since you cannot immediately deploy updates, you sometimes need to bake in hardcoded date-based logic. Testing future dates can be difficult if you don't know how to quickly change the date on your local machine.
To change the current date on your Mac, execute the following from command line:
# Date Format: MMDDYYYY
sudo date -I 06142024
This command does not modify time, only the current date. Using the same command to reset to current date is easy as well!
![9 Mind-Blowing WebGL Demos]()
As much as developers now loathe Flash, we're still playing a bit of catch up to natively duplicate the animation capabilities that Adobe's old technology provided us. Of course we have canvas, an awesome technology, one which I highlighted 9 mind-blowing demos. Another technology available...
![5 Ways that CSS and JavaScript Interact That You May Not Know About]()
CSS and JavaScript: the lines seemingly get blurred by each browser release. They have always done a very different job but in the end they are both front-end technologies so they need do need to work closely. We have our .js files and our .css, but...
![Create a Simple News Scroller Using MooTools, Part I: The Basics]()
News scroller have been around forever on the internet. Why? Because they're usually classy and effective. Over the next few weeks, we'll be taking a simple scroller and making it into a flexible, portable class. We have to crawl before we...
![Advanced CSS Tables II – Using Mootools JavaScript For Alternate Row Colors]()
I didn’t understand your exact use case, but a helpful way to do date-related testing without modifying your actual computer date/time, is to shim the system calls with library pre-loading. On a Mac, dyld can do this with DYLD_LIBRARY_PATH. On Linux, GNU ld can do it with LD_LIBRARY_PATH.
This makes it easy to write tests for specific situations, such as monthly changeovers, leap-occurrences, timezones, etc.
“libfaketime” is a handy library written for this, https://github.com/wolfcw/libfaketime. It’s even packaged in homebrew, just do
brew install libfaketime
. :)