Daylight Zombies is a simple mod that spawns zombies durning the day and makes them weaker in the day too, It can be customized to your liking and its super performance friendly.

Zombies are weaker in the day aswell their stats are cut down 20% by their original stats (configurable) and this function can be turned on and off by the config file.

The mod doesnt prevent zombies from burning in the day currently, Which is done on purpose but i might change my mind later, Use a mod like Mob Sunscreen to prevent zombies from burning in the daytime.

Config Preview:

[spawning]
#Max number of daylight zombies allowed near a single player at once
#Range: 0 ~ 100
maxZombiesPerPlayer = 15
#Radius (blocks) around a player to count existing zombies and spawn new ones
#Range: 4.0 ~ 256.0
spawnRadius = 128.0
#Minimum distance (blocks) from the player a zombie can spawn
#Range: 1.0 ~ 256.0
minSpawnDistance = 64.0
#How often (in ticks, 20 = 1 second) to run the spawn check. Higher = lighter on performance
#Range: 20 ~ 12000
spawnCheckIntervalTicks = 100
#Chance (0.0 - 1.0) a spawn attempt succeeds each time the check runs for a player
#Range: 0.0 ~ 1.0
spawnChance = 0.5
#If true, this mod only spawns zombies during daytime
onlyDuringDay = true
#If true, zombies only spawn at positions that can see the sky
requireSkyVisible = false

[behavior]
#If true, zombies spawned by this mod during the day get weakened stats
daylightWeaknessEnabled = true
#Percent to reduce max health, attack damage, and movement speed of zombies spawned by this mod during the day. Only applies if daylightWeaknessEnabled is true. 0 = no reduction, 100 = fully weakened
#Range: 0.0 ~ 100.0
daylightWeaknessPercent = 20.0

Permissions & Licensing:

You can freely use this mod in your modpack.
You cannot modify this mod then redistribute the modified version.

DayLight Zombies