diff --git a/requirements.txt b/requirements.txt
index d9726c0e..9bdb3618 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,3 +4,5 @@ pytest>=4.3.1
 psycopg2-binary>=2.8
 aiohttp>=3.5.4
 sqlalchemy>=1.3.2
+Markdown>=3.1
+dateparser>=0.7.1
diff --git a/royalgames.py b/royalgames.py
index 8589584e..14a079a7 100644
--- a/royalgames.py
+++ b/royalgames.py
@@ -1,9 +1,8 @@
 import os
 import asyncio
 from royalnet.bots import TelegramBot
-from royalnet.commands import PingCommand, ShipCommand, SmecdsCommand, ColorCommand, CiaoruoziCommand, SyncCommand, DiarioCommand, RageCommand
+from royalnet.commands import *
 from royalnet.commands.debug_create import DebugCreateCommand
-from royalnet.commands.debug_author import DebugAuthorCommand
 from royalnet.commands.error_handler import ErrorHandlerCommand
 from royalnet.network import RoyalnetServer
 from royalnet.database.tables import Royal, Telegram
@@ -11,7 +10,7 @@ from royalnet.database.tables import Royal, Telegram
 loop = asyncio.get_event_loop()
 
 commands = [PingCommand, ShipCommand, SmecdsCommand, ColorCommand, CiaoruoziCommand, DebugCreateCommand, SyncCommand,
-            DebugAuthorCommand, DiarioCommand, RageCommand]
+            AuthorCommand, DiarioCommand, RageCommand, DateparserCommand, ReminderCommand]
 
 master = RoyalnetServer("localhost", 1234, "sas")
 tg_bot = TelegramBot(os.environ["TG_AK"], "localhost:1234", "sas", commands, os.environ["DB_PATH"], Royal, Telegram, "tg_id", error_command=ErrorHandlerCommand)
diff --git a/royalnet/bots/telegram.py b/royalnet/bots/telegram.py
index 181650fc..c6e683b0 100644
--- a/royalnet/bots/telegram.py
+++ b/royalnet/bots/telegram.py
@@ -4,7 +4,7 @@ import typing
 import logging as _logging
 import sys
 from ..commands import NullCommand
-from ..utils import asyncify, Call, Command
+from ..utils import asyncify, Call, Command, UnregisteredError
 from ..network import RoyalnetLink, Message
 from ..database import Alchemy, relationshiplinkchain
 
@@ -71,16 +71,21 @@ class TelegramBot:
                 response = await self.network.request(message, destination)
                 return response
 
-            async def get_author(call):
+            async def get_author(call, error_if_none=False):
                 update: telegram.Update = call.kwargs["update"]
                 user: telegram.User = update.effective_user
                 if user is None:
+                    if error_if_none:
+                        raise UnregisteredError("Author is not registered!")
                     return None
                 query = call.session.query(self.master_table)
                 for link in self.identity_chain:
                     query = query.join(link.mapper.class_)
                 query = query.filter(self.identity_column == user.id)
-                return await asyncify(query.one_or_none)
+                result = await asyncify(query.one_or_none)
+                if result is None and error_if_none:
+                    raise UnregisteredError("Author is not registered!")
+                return result
 
         self.TelegramCall = TelegramCall
 
diff --git a/royalnet/commands/__init__.py b/royalnet/commands/__init__.py
index 78f7657f..d9670135 100644
--- a/royalnet/commands/__init__.py
+++ b/royalnet/commands/__init__.py
@@ -7,7 +7,10 @@ from .color import ColorCommand
 from .sync import SyncCommand
 from .diario import DiarioCommand
 from .rage import RageCommand
+from .dateparser import DateparserCommand
+from .author import AuthorCommand
+from .reminder import ReminderCommand
 
 
 __all__ = ["NullCommand", "PingCommand", "ShipCommand", "SmecdsCommand", "CiaoruoziCommand", "ColorCommand",
-           "SyncCommand", "DiarioCommand", "RageCommand"]
+           "SyncCommand", "DiarioCommand", "RageCommand", "DateparserCommand", "AuthorCommand", "ReminderCommand"]
diff --git a/royalnet/commands/debug_author.py b/royalnet/commands/author.py
similarity index 80%
rename from royalnet/commands/debug_author.py
rename to royalnet/commands/author.py
index 7400ee85..188ec55f 100644
--- a/royalnet/commands/debug_author.py
+++ b/royalnet/commands/author.py
@@ -1,10 +1,10 @@
-from ..utils import Command, CommandArgs, Call
+from ..utils import Command, Call
 from ..database.tables import Royal, Telegram
 
 
-class DebugAuthorCommand(Command):
+class AuthorCommand(Command):
 
-    command_name = "debug_author"
+    command_name = "author"
     command_description = "Ottieni informazioni sull'autore di questa chiamata."
     command_syntax = ""
 
diff --git a/royalnet/commands/color.py b/royalnet/commands/color.py
index 4c920486..ff9a458f 100644
--- a/royalnet/commands/color.py
+++ b/royalnet/commands/color.py
@@ -1,4 +1,4 @@
-from ..utils import Command, CommandArgs, Call
+from ..utils import Command, Call
 
 
 class ColorCommand(Command):
diff --git a/royalnet/commands/dateparser.py b/royalnet/commands/dateparser.py
new file mode 100644
index 00000000..c2dc401f
--- /dev/null
+++ b/royalnet/commands/dateparser.py
@@ -0,0 +1,21 @@
+import datetime
+import dateparser
+from ..utils import Command, Call, InvalidInputError
+
+
+class DateparserCommand(Command):
+
+    command_name = "dateparser"
+    command_description = "Legge e comprende la data inserita."
+    command_syntax = "(data)"
+
+    @classmethod
+    async def common(cls, call: Call):
+        if len(call.args) == 0:
+            raise InvalidInputError("Missing arg")
+        text = " ".join(call.args)
+        date: datetime.datetime = dateparser.parse(text)
+        if date is None:
+            await call.reply("🕕 La data inserita non è valida.")
+            return
+        await call.reply(f"🕐 La data inserita è {date.isoformat()}")
diff --git a/royalnet/commands/debug_create.py b/royalnet/commands/debug_create.py
index faaedfb2..3b06e7c1 100644
--- a/royalnet/commands/debug_create.py
+++ b/royalnet/commands/debug_create.py
@@ -1,4 +1,4 @@
-from ..utils import Command, CommandArgs, Call, asyncify
+from ..utils import Command, Call, asyncify
 from ..database.tables import Royal, Alias
 
 
diff --git a/royalnet/commands/diario.py b/royalnet/commands/diario.py
index 7159bddf..c078cffc 100644
--- a/royalnet/commands/diario.py
+++ b/royalnet/commands/diario.py
@@ -45,10 +45,7 @@ class DiarioCommand(Command):
     @classmethod
     async def common(cls, call: Call):
         # Find the creator of the quotes
-        creator = await call.get_author()
-        if creator is None:
-            await call.reply("⚠️ Devi essere registrato a Royalnet per usare questo comando!")
-            return
+        creator = await call.get_author(error_if_none=True)
         # Recreate the full sentence
         raw_text = " ".join(call.args)
         # Pass the sentence through the diario regex
diff --git a/royalnet/commands/error_handler.py b/royalnet/commands/error_handler.py
index 13f2a299..70c6a521 100644
--- a/royalnet/commands/error_handler.py
+++ b/royalnet/commands/error_handler.py
@@ -1,6 +1,6 @@
 import traceback
 from logging import Logger
-from ..utils import Command, CommandArgs, Call, InvalidInputError, UnsupportedError
+from ..utils import Command, CommandArgs, Call, InvalidInputError, UnsupportedError, UnregisteredError
 
 
 class ErrorHandlerCommand(Command):
@@ -22,7 +22,10 @@ class ErrorHandlerCommand(Command):
             return
         if e_type == InvalidInputError:
             command = call.kwargs["previous_command"]
-            await call.reply(f"⚠️ Sintassi non valida.\nSintassi corretta:[c]/{command.command_name} {command.command_syntax}[/c]")
+            await call.reply(f"⚠️ Sintassi non valida.\nSintassi corretta: [c]/{command.command_name} {command.command_syntax}[/c]")
+            return
+        if e_type == UnregisteredError:
+            await call.reply("⚠️ Devi essere registrato a Royalnet per usare questo comando!")
             return
         await call.reply(f"❌ Eccezione non gestita durante l'esecuzione del comando:\n[b]{e_type.__name__}[/b]\n{e_value}")
         formatted_tb: str = '\n'.join(traceback.format_tb(e_tb))
diff --git a/royalnet/commands/null.py b/royalnet/commands/null.py
index 441d090b..f30db9fb 100644
--- a/royalnet/commands/null.py
+++ b/royalnet/commands/null.py
@@ -1,4 +1,4 @@
-from ..utils import Command, CommandArgs, Call
+from ..utils import Command, Call
 
 
 class NullCommand(Command):
diff --git a/royalnet/commands/ping.py b/royalnet/commands/ping.py
index 04ea42bd..df280dd7 100644
--- a/royalnet/commands/ping.py
+++ b/royalnet/commands/ping.py
@@ -1,5 +1,5 @@
 import asyncio
-from ..utils import Command, CommandArgs, Call, InvalidInputError
+from ..utils import Command, Call, InvalidInputError
 
 
 class PingCommand(Command):
diff --git a/royalnet/commands/reminder.py b/royalnet/commands/reminder.py
new file mode 100644
index 00000000..cae785f8
--- /dev/null
+++ b/royalnet/commands/reminder.py
@@ -0,0 +1,28 @@
+import datetime
+import dateparser
+import typing
+from ..utils import Command, Call, sleep_until
+
+
+class ReminderCommand(Command):
+
+    command_name = "reminder"
+    command_description = "Ripete quello che gli avevi chiesto dopo un po' di tempo."
+    command_syntax = "[ (data) ] (testo)"
+
+    @classmethod
+    async def common(cls, call: Call):
+        match = call.args.match(r"\[ *(.+?) *] *(.+?) *$")
+        date_str = match.group(1)
+        reminder_text = match.group(2)
+        date: typing.Optional[datetime.datetime]
+        try:
+            date = dateparser.parse(date_str)
+        except OverflowError:
+            date = None
+        if date is None:
+            await call.reply("⚠️ La data che hai inserito non è valida.")
+            return
+        await call.reply(f"✅ Promemoria impostato per [b]{date.strftime('%Y-%m-%d %H:%M:%S')}[/b]")
+        await sleep_until(date)
+        await call.reply(f"❗️ Promemoria: [b]{reminder_text}[/b]")
diff --git a/royalnet/commands/ship.py b/royalnet/commands/ship.py
index c0b014af..8ec4e661 100644
--- a/royalnet/commands/ship.py
+++ b/royalnet/commands/ship.py
@@ -1,5 +1,5 @@
 import re
-from ..utils import Command, CommandArgs, Call, safeformat
+from ..utils import Command, Call, safeformat
 
 
 SHIP_RESULT = "💕 {one} + {two} = [b]{result}[/b]"
diff --git a/royalnet/commands/smecds.py b/royalnet/commands/smecds.py
index 7e8bc21c..6d5616d4 100644
--- a/royalnet/commands/smecds.py
+++ b/royalnet/commands/smecds.py
@@ -1,5 +1,5 @@
 import random
-from ..utils import Command, CommandArgs, Call, safeformat
+from ..utils import Command, Call, safeformat
 
 
 DS_LIST = ["della secca", "del seccatore", "del secchiello", "del secchio", "del secchione", "del secondino",
diff --git a/royalnet/commands/sync.py b/royalnet/commands/sync.py
index 2dc7dadd..288ce3c1 100644
--- a/royalnet/commands/sync.py
+++ b/royalnet/commands/sync.py
@@ -1,6 +1,6 @@
 import typing
 from telegram import Update, User
-from ..utils import Command, CommandArgs, Call, asyncify, UnsupportedError
+from ..utils import Command, Call, asyncify, UnsupportedError
 from ..database.tables import Royal, Telegram
 
 
diff --git a/royalnet/database/tables/aliases.py b/royalnet/database/tables/aliases.py
index 7f86ffa6..f88f79d7 100644
--- a/royalnet/database/tables/aliases.py
+++ b/royalnet/database/tables/aliases.py
@@ -1,8 +1,6 @@
 from sqlalchemy import Column, \
                        Integer, \
                        String, \
-                       BigInteger, \
-                       LargeBinary, \
                        ForeignKey
 from sqlalchemy.orm import relationship
 from .royals import Royal
diff --git a/royalnet/utils/__init__.py b/royalnet/utils/__init__.py
index c75aaa79..7060c955 100644
--- a/royalnet/utils/__init__.py
+++ b/royalnet/utils/__init__.py
@@ -1,8 +1,9 @@
 from .asyncify import asyncify
-from .call import Call
+from .call import Call, UnregisteredError
 from .command import Command, CommandArgs, InvalidInputError, UnsupportedError, InvalidConfigError, ExternalError
 from .safeformat import safeformat
 from .classdictjanitor import cdj
+from .sleepuntil import sleep_until
 
 __all__ = ["asyncify", "Call", "Command", "safeformat", "InvalidInputError", "UnsupportedError", "CommandArgs",
-           "cdj", "InvalidConfigError", "ExternalError"]
+           "cdj", "InvalidConfigError", "ExternalError", "sleep_until", "UnregisteredError"]
diff --git a/royalnet/utils/call.py b/royalnet/utils/call.py
index ab31c6bc..9d0afba2 100644
--- a/royalnet/utils/call.py
+++ b/royalnet/utils/call.py
@@ -10,6 +10,10 @@ if typing.TYPE_CHECKING:
 loop = asyncio.get_event_loop()
 
 
+class UnregisteredError(Exception):
+    pass
+
+
 class Call:
     """A command call. Still an abstract class, subbots should create a new call from this."""
 
@@ -27,9 +31,10 @@ class Call:
         The data must be pickleable."""
         raise NotImplementedError()
 
-    async def get_author(self):
+    async def get_author(self, error_if_none=False):
         """Try to find the universal identifier of the user that sent the message.
-        That probably means, the database row identifying the user."""
+        That probably means, the database row identifying the user.
+        Raise a UnregisteredError if error_if_none is set to True and no author is found."""
         raise NotImplementedError()
 
     # These parameters / methods should be left alone
diff --git a/royalnet/utils/command.py b/royalnet/utils/command.py
index 098f78d0..84a26f8e 100644
--- a/royalnet/utils/command.py
+++ b/royalnet/utils/command.py
@@ -1,3 +1,4 @@
+import re
 import typing
 if typing.TYPE_CHECKING:
     from .call import Call
@@ -35,6 +36,18 @@ class CommandArgs(list):
                 raise InvalidInputError(f'Tried to get invalid [{item}] slice from CommandArgs')
         raise ValueError(f"Invalid type passed to CommandArgs.__getattr__: {type(item)}")
 
+    def match(self, pattern: typing.Pattern) -> typing.Match:
+        text = " ".join(self)
+        match = re.match(pattern, text)
+        if match is None:
+            raise InvalidInputError("Pattern didn't match")
+        return match
+
+    def optional(self, index: int) -> typing.Optional:
+        try:
+            return self[index]
+        except IndexError:
+            return None
 
 class Command:
     """A generic command, called from any source."""