Mmmm, I'm not so sure about that anymore ... at least not for a while yet.

Trump has a lot of leeway to declare emergency rulings and to have those enforced in the short term. Such powers come with a short leash that require appeals to be addressed in a short time frame.

That mechanism was upended twenty four days ago when US Republicians effectively "stopped time" ..

  Each day for the remainder of the first session of the 119th Congress shall not constitute a calendar day for purposes of section 202 of the National Emergencies Act (50 U.S.C. 1622) with respect to a joint resolution terminating a national emergency declared by the President on February 1, 2025.
~ https://www.congress.gov/bill/119th-congress/house-resolutio...

"Each day [..] shall not constitute a calendar day"

This does not appear (on my admittedly brief search) to be something routine in US resolutions.

There's some further commentary here:

  The Constitution gives to Congress, not the president, the power to impose tariffs. But the International Emergency Economic Powers Act allows the president to impose tariffs if he declares a national emergency under the National Emergencies Act, which Trump did on February 1. That same law allows Congress to end such a declaration of emergency, but if such a termination is introduced—as Democrats have recently done—it has to be taken up in a matter of days.

  But this would force Republicans to go on record as either supporting or opposing the unpopular economic ideology Trump and Musk are imposing. So Republicans just passed a measure saying that for the rest of this congressional session, “each day…shall not constitute a calendar day” for the purposes of terminating Trump’s emergency declaration.
~ https://heathercoxrichardson.substack.com/p/march-12-2025

I honestly don't understand this "stopped time" tactic? Reading the sources seems more confusing.

Can someone explain like I'm a college freshman?

It's an odd piece of procedural technicality.

* Trump declared emergency Tariff powers.

* An appeal was made to stop this.

* The appeal has to be heard and voted on within X number of "Calendar days"

* "Calendar days" usually means "every day of the week, including weekends and holidays, as a 24-hour period from one midnight to the next."

* However this term has been "redefined in a context" such that it no longer means that ... (just with respect to the appeal against Trump's tariff powers)

with the result that the filed appeal will never be heard or voted on within the current session.

Programmers likely are familier with changing the meaning or type of things within a context .. it's a procedural version of that.