diff --git a/modules/cogs/birthday.py b/modules/cogs/birthday.py
new file mode 100644
index 0000000..b7194a7
--- /dev/null
+++ b/modules/cogs/birthday.py
@@ -0,0 +1,96 @@
+import discord, re
+from discord import option
+from discord.ext import commands
+from ..setup.logger import LOGGER
+from ..setup.data import get_guild_data, save_guild_data
+
+class BirthdayCog(commands.Cog):
+    def __init__(self, bot):
+        self.bot = bot
+    
+    @commands.slash_command(description='Sets birthday date. Must be in DAY/MONTH format.')
+    @option(name='date',description='Birthday date.',required=True)
+    @option(name='for_user',description='The user to set the birthday date for.',required=False,type=discord.Member)
+    async def birthday_set(self,ctx:discord.ApplicationContext, date:str, for_user:discord.Member):
+        """Sets birthday date. Must be in DAY/MONTH format."""
+        command_name = 'birthday_set'
+        guild_id = ctx.guild.id
+        guild_data = get_guild_data(guild_id)
+        author = ctx.author
+        if re.match(r'\d{2}\/\d{2}',date): # Check if date is in DAY/MONTH format
+            if for_user:
+                if author.guild_permissions.administrator: # Check if author is an administrator in case they want to set the birthday for another user
+                    LOGGER.debug(f'{author.name} used /{command_name} {date} for {for_user.name}.')
+                    if 'birthday' not in guild_data.keys():
+                        guild_data['birthday'] = dict()
+                    if for_user.id not in guild_data['birthday'].keys():
+                        guild_data['birthday'][str(for_user.id)] = dict()
+                    guild_data['birthday'][str(for_user.id)]['date'] = date
+                    if 'announcements' not in guild_data['birthday'][str(for_user.id)].keys():
+                        guild_data['birthday'][str(for_user.id)]['announcements'] = True
+                    
+                    save_guild_data(guild_id, guild_data)
+                    await ctx.send_response(f'Birthday for {for_user.name} has been set to {date}.',ephemeral=True)
+                else:
+                    LOGGER.debug(f'{author.name} tried to use /{command_name} {date} for {for_user.name} but is not an administrator.')
+                    await ctx.send_response('You must be an administrator to run the command with "for_user".',ephemeral=True)
+            else:
+                # Set birthday for author
+                LOGGER.debug(f'{author.name} used /{command_name} {date}.')
+                if 'birthday' not in guild_data.keys():
+                    guild_data['birthday'] = dict()
+                if author.id not in guild_data['birthday'].keys():
+                    guild_data['birthday'][str(author.id)] = dict()
+                guild_data['birthday'][str(author.id)]['date'] = date
+                if 'announcements' not in guild_data['birthday'][str(author.id)].keys():
+                    guild_data['birthday'][str(author.id)]['announcements'] = True
+                save_guild_data(guild_id, guild_data)
+                
+                # The status defines the human readable status of the announcements to be displayed in the response.
+                announcements_status = 'are enabled' if guild_data['birthday'][str(author.id)]['announcements'] else 'aren\'t enabled'
+                await ctx.send_response(f'Your birthday has been set to {date} and announcements {announcements_status}.',ephemeral=True)
+        else:
+            LOGGER.debug(f'{author.name} used /set_birthday {date} but the format is not correct.')
+            await ctx.send_response('The date must is DAY/MONTH format.',ephemeral=True)
+
+    @commands.slash_command(description='Enable or disable birthday announcements.')
+    @option(name='enable',description='Enable birthday announcements.',required=True)
+    @option(name='for_user',description='The user to enable or disable birthday announcements for.',required=False,type=discord.Member)
+    async def birthday_announcements(self,ctx:discord.ApplicationContext, enable:bool, for_user:discord.Member):
+        """Enable or disable birthday announcements."""
+        command_name = 'birthday_announcements'
+        guild_id = ctx.guild.id
+        guild_data = get_guild_data(guild_id) or dict()
+        author = ctx.author
+        if for_user:
+            if author.guild_permissions.administrator: # Check if author is an administrator in case they want to set the birthday for another user
+                LOGGER.debug(f'{author.name} used /{command_name} {enable} for {for_user.name}.')
+                guild_data['birthday'][str(for_user.id)]['announcements'] = enable
+                save_guild_data(guild_id, guild_data)
+                await ctx.send_response(f'Announcements for {for_user.name} are set to {enable}',ephemeral=True)
+            else:
+                LOGGER.debug(f'{author.name} tried to use /{command_name} {enable} for {for_user.name} but is not an administrator.')
+                await ctx.send_response('You must be an administrator to run the command with "for_user".',ephemeral=True)
+        else:
+            LOGGER.debug(f'{author.name} used /{command_name} {enable}.')
+            guild_data['birthday'][str(author.id)]['announcements'] = enable
+            save_guild_data(guild_id, guild_data)
+            await ctx.send_response(f'Your birthday announcements have been set to {enable}',ephemeral=True)
+
+    @commands.slash_command(description='Sets the channel to send birthday announcements to.')
+    @option(name='channel',description='The channel to send birthday announcements to.',required=True,type=discord.TextChannel)
+    async def birthday_announcements_channel(self,ctx:discord.ApplicationContext, channel:discord.TextChannel):
+        """Sets the channel to send birthday announcements to."""
+        command_name = 'birthday_announcements_channel'
+        guild_id = ctx.guild.id
+        guild_data = get_guild_data(guild_id) or dict()
+        author = ctx.author
+        if author.guild_permissions.administrator:
+            LOGGER.debug(f'{author.name} used /{command_name} {channel.name}.')
+            guild_data['birthday_announcements_channel'] = channel.id
+            save_guild_data(guild_id, guild_data)
+            await ctx.send_response(f'Birthday announcements will be sent to {channel.name}.',ephemeral=True)
+        else:
+            LOGGER.debug(f'{author.name} tried to use /{command_name} {channel.name} but is not an administrator.')
+            await ctx.send_response('You must be an administrator to run this command.',ephemeral=True)
+
diff --git a/modules/setup/bot.py b/modules/setup/bot.py
new file mode 100644
index 0000000..50ea39c
--- /dev/null
+++ b/modules/setup/bot.py
@@ -0,0 +1,13 @@
+import discord
+from ..cogs.birthday import BirthdayCog
+
+bot_intents = discord.Intents.default()
+bot_intents.message_content = True
+bot_intents.members = True
+bot_intents.presences = True
+bot_intents.guilds = True
+bot_intents.reactions = True
+
+bot = discord.Bot(command_prefix='$', intents=bot_intents)
+
+bot.add_cog(BirthdayCog(bot))
\ No newline at end of file
diff --git a/modules/setup/data.py b/modules/setup/data.py
new file mode 100644
index 0000000..797c9f1
--- /dev/null
+++ b/modules/setup/data.py
@@ -0,0 +1,15 @@
+import os, json
+
+DATA_DIR = 'data/'
+
+def get_guild_data(guild_id:int):
+    """Reads and returns the dictionary of guild data from the guild's JSON data file."""
+    path = os.path.join(DATA_DIR, f'{guild_id}.json')
+    with open(path, 'r') as f:
+        return json.load(f)
+
+def save_guild_data(guild_id:int, data):
+    """Saves the dictionary of guild data to the guild's JSON data file."""
+    path = os.path.join(DATA_DIR, f'{guild_id}.json')
+    with open(path, 'w') as f:
+        json.dump(data, f, indent=2)
\ No newline at end of file
diff --git a/modules/setup/logger.py b/modules/setup/logger.py
new file mode 100644
index 0000000..4055e58
--- /dev/null
+++ b/modules/setup/logger.py
@@ -0,0 +1,8 @@
+import logging
+
+logging.basicConfig(level=logging.INFO, format='[%(levelname)s] %(asctime)s: %(name)s: %(message)s')
+LOGGER = logging.getLogger('botmafieux')
+LOGGER.setLevel(logging.DEBUG)
+handler = logging.FileHandler(filename='botmafieux.log', encoding='utf-8', mode='w')
+handler.setFormatter(logging.Formatter('%(asctime)s:%(levelname)s:%(name)s: %(message)s'))
+LOGGER.addHandler(handler)
\ No newline at end of file