1) MAJ de la table Bills :
ALTER TABLE `Bills` CHANGE `BillDate` `BillDate` DATETIME NOT NULL;

2) Création des tables ExitPermissions, LaundryRegistrations et SnackRegistrations :
-- 
-- Structure de la table `ExitPermissions`
-- 

CREATE TABLE IF NOT EXISTS `ExitPermissions` (
  `ExitPermissionID` mediumint(8) unsigned NOT NULL auto_increment,
  `ExitPermissionDate` date NOT NULL,
  `ExitPermissionName` varchar(100) NOT NULL,
  `ExitPermissionAuthorizedPerson` tinyint(3) unsigned NOT NULL default '1',
  `ChildID` smallint(5) unsigned NOT NULL,
  PRIMARY KEY  (`ExitPermissionID`),
  KEY `ChildID` (`ChildID`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 COMMENT='Table which contains exit permissions of children.';

-- --------------------------------------------------------

-- 
-- Structure de la table `LaundryRegistrations`
-- 

CREATE TABLE IF NOT EXISTS `LaundryRegistrations` (
  `LaundryRegistrationID` mediumint(8) unsigned NOT NULL auto_increment,
  `LaundryRegistrationDate` date NOT NULL,
  `FamilyID` smallint(5) unsigned NOT NULL,
  PRIMARY KEY  (`LaundryRegistrationID`),
  KEY `FamilyID` (`FamilyID`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 COMMENT='Table which contains laundry registrations for families.';

-- --------------------------------------------------------

-- 
-- Structure de la table `SnackRegistrations`
-- 

CREATE TABLE IF NOT EXISTS `SnackRegistrations` (
  `SnackRegistrationID` mediumint(8) unsigned NOT NULL auto_increment,
  `SnackRegistrationDate` date NOT NULL,
  `SnackRegistrationClass` tinyint(3) unsigned NOT NULL,
  `FamilyID` smallint(5) unsigned NOT NULL,
  PRIMARY KEY  (`SnackRegistrationID`),
  KEY `FamilyID` (`FamilyID`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 COMMENT='Table which contains snack registrations for families.';

3) MAJ fichiers php/js/css

4) Mettre dans le cron les scripts suivants :
SendEmailLaundryReminder.php
SendEmailSnackDuringWeekReminder.php
SendEmailSnackReminder.php