By default they will wait until noon each day before going about their day as normal. You can have them wait all day by setting MaxWaitHour to -1 in the config.
You can edit the config in Generic Mod Config Menu or by editing the mod's config.json file after starting the game once.
Technical
Requires SMAPI, uses Harmony.
Implements a Generic Mod Config Menu interface to change config settings in-game.
Compatible with Mod Updater for automatic updates.
Code is at https://github.com/aedenthorn/StardewValleyMods.
If you want to complain or ask for help or help me test my mods, you can visit my Discord server.
A list of all my mods for Stardew Valley is available at https://www.nexusmods.com/stardewvalley/articles/895.