What are seasons in Forza Horizon 4?
Seasons are a game-changing feature that were introduced alongside the game back in 2018, and with them comes many new challenges, races, rewards, etc.
In this guide, you will find useful information about what seasons are, how often they change and how you can progress within them.

Each month, the game receives an update, renewing the contents of seasons in the form of Series X update (X is the number of the update the game has received). Each series includes 4 seasons of its own, which cycle weekly. With the implementation of the update, we start with the summer season. After that, we have the Autumn season, then the Winter season, and last but not least, we conclude the series with Spring season.

To join the horizon roster and unlock the cycling seasons feature for yourself, you have to qualify for each seasons and complete its corresponding showcase event. (Meaning what?)
After you arrive at the Festival in the opening act of the game, you have to qualify for the Horizon Summer season, then earn influence to unlock the showcase event, then going on to qualify for Horizon Autumn season, then qualifying for its showcase, and... exactly the same for the remaining two seasons. Finally, you have to earn enough influence (XP) to officially join the horizon roster.
TL;DR
Arriving at the Horizon Festival ➜ Qualifying for the Summer Season ➜ Qualifying for the Summer Season Showcase Event ➜ Qualifying for the Autumn Season ➜ Qualifying for the Autumn Season Showcase Event ➜ Qualifying for the Winter Season ➜ Qualifying for the Winter Season Showcase Event ➜ Qualifying for the Spring Season ➜ Qualifying for the Spring Season Showcase Event ➜ Joining the Horizon Roster
It may seem long and tiring, but it's easier than it looks :)

Each season lasts about one week. The seasons cycle weekly and they begin right after one-another.
As stated earlier, each season includes its own series of races, championships, challenges, rewards, etc. To be more specific, have a quick look at the content map below.

Now this was just to show you what we're talking about, seasonal-content-wise. (:D) Many things have changed since the game first launched back in 2018, and now, we're going to go over everything we need to know about seasons and their contents.

The content of each season is:

• Photo Challenge
  
• Weekly #Forzathon Challenge
  
• Daily #Forzathon Challenges
  
• The Trial Championship
  
• Showcase Event Re-mix (Only 2 seasons in each series update)
  
• Seasonal Playground Games
  
• 3 Seasonal PR Stunts
  
• 3 Seasonal Championships

Each of these contents that you complete in each season adds to the percentage of the season. Complete 50% of the season and you get either a cool car or a backstage pass (which you can use to redeem even cooler cars!) Complete 80% of the season and you'll receive the car that is only the best of the best. Completing seasonal content also adds to the percentage of the series. Complete 50% of the series (which requires you to complete 50% of each season in the series) and you'll get a backstage pass. Complete 80% (which requires lots of dedication to seasonal content) and you'll get a car at least worth 10mil CR.

Now let's get to what these are and what we have to do to complete them.

Photo Challenge:

First off, we have the photo challenge, which is by far the easiest part of each season, you view the requirements of the challenge directly from the Festival Playlist menu (found at the main pause menu of the game) and complete the challenge. This challenge basically wants you to take a specific car to a specific place in the game, open up photo mode, take the pic, and voilà! Photo challenges give you a super wheelspin as a reward.

Weekly and Daily #Forzathon Challenges:

This challenge is a bit long. It consists of 4 individual series of tasks for you to do, which is basically 3, because the 1st one always wants you to own a certain kind of vehicle. The other 3 require you to compete in certain events, ace specific PR stunts or do other crazy things, but in the end, you're left with 100 #Forzathon points (200 if you have the VIP pass), which is cool!

The daily challenges refresh daily and are pretty simple and straightforward. They require you to do certain skill moves and once you've done them, they give their reward and show as "golden" in the Festival Playlist menu.

The Trial Championship:

This one's TOUGH! This challenge is actually a co-op PvE championship, which puts you and other players in a team, against AI Drivers (A.K.A DRIVATARS) with the highest difficulty in the game, which is unbeatable. You have to race 3 events in the form of a championship with other players and whichever team wins 2 out of 3 races, emerges victorious! The reward for the Trial is usually rare cars.

Showcase Event Re-mix (Only 2 seasons in each series update):

This is my favorite part of each season. In 2 out of the 4 seasons of each series, we have a remixed version of the 5 original showcase events of the game. According to the weather specific to each season, the showcase event receives remixed music, as well as car to propose a more fun, more challenging event for the season. The reward for showcase remixes is usually Super Wheelspins.

Seasonal Playground Games:

Each season, we have a set of 5 different playground games, which is comprised of 12 players (2 teams of 6) competing in 3 game modes: King, Flag Rush and Survival (Infected). This one is by far the most pointless one imo, because most of the players either quit very early in the set or either suffer from terrible connections, which results in unbalanced teams, and inevitable demise of one team. The reward for the seasonal games is usually hard-to-find cars.

3 Seasonal PR Stunts

After Photo Challenge, this one is the easiest and the quickest available challenge in each season. We have 4 types of PR stunts in the game:

• Speed Zones
  
• Speed Traps
  
• Danger Signs (Jumps)
  
• Drift Zones

Each season, we get 3 different seasonal PR stunts, and what they require to complete is basically a little bit more than what is needed to get 3 stars in the said stunt. For example, the "Northbound Danger Sign" require a jump of 213.4 M to get 3 stars. The seasonal objective of this stunt is 218.4 M. The rewards for seasonal PR stunts are Super Wheelspins.

3 Seasonal Championships

Lastly, we have 3 championships for each season (A championship is a set of 3 race events). These are pretty basic and to receive the ultimate award the have to offer, you have to set the difficulty of the AI to "Highly skilled". The rewards for seasonal championships are either rare or legendary cars or clothing items.


Quick note!

Each series, we also have ranked online adventure and Monthly Rivals, which is not 100% needed to compete in. The online adventure is basically comprised of PvP super-unjust championships, but the Monthly Rivals puts you in a specific track with a certain car, and requires you to do laps, in order to break you friends' and other players' records. This can be completed with just one lap, which takes about 1 minute, so I advise you to do it if you can.

In this guide, I tried to explain extensively how seasons work, what rewards they give and how you can compete and progress within seasons. This was my first EVER guide, so if you find any problem with the guide, any parts of the guide I failed to explain properly or if you have any remarks or thoughts, please let me know in the comments section.
Hope you liked this one