ORDO is a perpetual liturgical calendar (until 2037) and a missal for the traditional Catholic rite (compliant with the Roman missal of 1962), with for each day: - The different festivals of the day, - Clean texts for each day, - The lives of the saints of the day. - The Ordinary of the Mass including the texts of each day - The choice of the form of the Mass (read/sung) - For the sung Masses, the main Gregorian scores of the Kyriale All the information is in the application, and is not downloaded from the Internet: it is therefore always available. THE CALENDAR He understands : - Sundays, holidays, vigils, octaves and holidays, - Commemorations (or memories), - The universal solemnities and those of France, - Different celebrations possible on the same day, - Certain festivals specific to France, Brittany and the diocese of Paris and Switzerland. - Indications of obligatory holidays, days of fasting and abstinence. - Liturgical notes: celebrations prevented, moved, etc. THE READINGS & LIVES OF SAINT For each feast, the texts of the day are available, and a summary of the life of the saint(s) of the day. PRAYERS On Fridays during Lent, a Stations of the Cross is available. MISSAL The application can display the Ordinary of the Mass adapted to each day: - the form of the Mass (read/sung/solemn, and the short or long versions of the Four Times) - the own texts are included dynamically, - the ordinary adapts according to the day and liturgical time (for example, Asparagus Me/Vidi Aquam on Sundays, etc.) - Gregorian score for the main Masses of the Kyriale - Special ceremonies: blessings, processions, and Holy Week ceremonies. NAVIGATION IN THE APPLICATION The application allows: - navigate the calendar, which highlights the holiday of the day, - to go directly to a given date, - to search for parties (a single keyword), - display the details of a day, which gives access to the readings, - to choose the place in which the celebrations must be displayed. Do not hesitate to send emails to report any anomalies, send your comments and requests for improvements.