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!
![CSS @supports]()
Feature detection via JavaScript is a client side best practice and for all the right reasons, but unfortunately that same functionality hasn't been available within CSS. What we end up doing is repeating the same properties multiple times with each browser prefix. Yuck. Another thing we...
![Detect DOM Node Insertions with JavaScript and CSS Animations]()
I work with an awesome cast of developers at Mozilla, and one of them in Daniel Buchner. Daniel's shared with me an awesome strategy for detecting when nodes have been injected into a parent node without using the deprecated DOM Events API.
![WebSocket and Socket.IO]()
My favorite web technology is quickly becoming the WebSocket API. WebSocket provides a welcomed alternative to the AJAX technologies we've been making use of over the past few years. This new API provides a method to push messages from client to server efficiently...
![Smooth Scrolling with MooTools Fx.SmoothScroll]()
I get quite a few support requests for my previous MooTools SmoothScroll article and the issue usually boils down to the fact that SmoothScroll has become Fx.SmoothScroll. Here's a simple usage of Fx.SmoothScroll.
The HTML
The only HTML requirement for Fx.SmoothScroll is that all named...
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. :)