More than 18 months have passed since the Giants last hosted fans at Oracle Park.

Friday afternoon, they’ll once again welcome attendees to the bayside stadium to watch the Giants take on the Colorado Rockies in San Francisco’s home opener (1:35 p.m., NBC Sports Bay Area).

Quite a bit has changed in the intervening period between fan-attended games: Gabe Kapler has replaced Bruce Bochy as Giants manager, 2019 finale pinch-hitter Madison Bumgarner now wears Sedona red and 2019 finale starting pitcher Dereck Rodriguez signed this offseason with the Giants’ home-opening opponents.

And, of course, the stands will be more than half empty ( thanks to the coronavirus pandemic, which forced the Giants to keep out fans for last year’s 30-game home slate.

One last change, though, is that the Giants are a year and a half further along in their rebuild, giving fans reason to head to the park optimistic for a win against a team just entering its own reconstruction.

Here are five things Giants fans should know before they head to China Basin on Friday:

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1. Prove you’re healthy

The Giants are requiring fans to bring either a vaccination card or proof of a negative coronavirus test in order to enter Oracle Park.

Test results must be received within 72 hours of the first game a fan plans to attend during a homestand.

Fully vaccinated fans must bring a paper or electronic document verifying they are at least two weeks removed from their final dose (for Johnson & Johnson, that’s also the first dose).

Fans 18 and older can provide their negative test information thru the CLEAR mobile app, and fans under the age of 12. The Giants have more information on how to get through their protocols here.

2. Know where to go

The stadium has been divided into nine ballpark zones marked by section, and each zone has specific entrance/exit gates. There will also be designated restrooms and concession stands for each zone.

The Giants have provided maps to each zone on their website so fans can familiarize themselves before they go to the game.

But if you get lost, there will also be signage to guide you along.

3. Download the app

If you want to buy concessions, you’re going to have to do that via the MLB Ballpark app. The Giants have an introduction to the app on their website.

As a bonus, you can use the app to access your tickets so you don’t leave them in your other bag.

Speaking of bags, backpacks and bags larger than 16″x16″x8 are not allowed into the stadium. But if you have a bag smaller than that, you can pack it with outside food — that’s still allowed under the coronavirus restrictions.

4. COVID common sense

Fans are required to stay six feet apart from one another, sit in their assigned seats (with pods of two or four) and wear masks whenever they’re not actively eating or drinking.

Given that we’ve been masking and social distancing for more than a year now, fans ought to have the hang of that.

5. Have a little fun

Don’t have too much fun and go straying from your seat, but boy will it be nice to take in a ballgame.

Johnny Cueto will be on the mound and he won’t even have to face Nolan Arenado. First pitch is too early in the day for a full-on seagull swarm out in left field.

Grab some garlic fries and a soda and enjoy one of the best settings in Major League Baseball.

After a year away, you’ve surely earned it.

BONUS: If you read this far, somehow don’t have tickets and can pass the COVID protocols, tickets are improbably still available. Skip out of work early — it’s Friday anyway!