The list of calendar events for a month

• Kalendarium de Carmona (VI cent.)
• Antiphonarium Legionense (X cent. med.)
• Kalendarium Cordubensis (961)
• Codex Vigilanus seu Albeldensis (975)
• Codex Aemilianensis (994)
• Kalendarium de Ripolli (X cent. ex.)
• Liber ordinum sacerdotal (X cent. ex.)
• Liber ordinum episcopal (1052)
• Liber horarum (1055)
• Liber commicus (1067)
• Etymologiarum cum kalendario (1072)
• Missale cum kalendario, fragm. I (XI ex.)
• Kalendarium Mozarabicum, fragm. II
• Santoral de Saint-Michel de Cuxa (XII cent. med.)
• Missale Mixtum (1500)
• Breviarium Gothicum (1502)
• Kalendarium Gothicum (1775)

April (Julian) April (Gregorian)
1	KAL APLS		14
2	IIII NNS	Sancti Cresegoni et comitum eius martyrum	15
3	III	Sancte Teodosie uirginis et martyris Christi	16
4	II	*Obitum domini Isidori episcopi et confessoris, era DCLXL, Spalensis ecclesie episcopi*	17
5	NNS	*Sancti Ambrosii episcopi et confessoris*	18
6	VIII IDS		19
7	VII		20
8	VI		21
9	V		22
10	IIII		23
11	III		24
12	II	Sancti Victoris martyris Christi	25
13	IDS		26
14	XVIII KAL MDS		27
15	XVII		28
16	XVI	Sanctorum Obtati et Frontonis	29
17	XV		30
May (Gregorian)
18	XIIII	Sancti Eleuterii episcopi et comitum eius martyrum	1
19	XIII		2
20	XII		3
21	XI		4
22	X		5
23	VIIII		6
24	VIII	Sancti Georgii martyris Christi	7
25	VII	Sancti Marci euangelisle	8
26	VI	Sancti Timothei	9
27	V		10
28	IIII	*Sancti Prudentii et comitum eius*	11
29	III		12
30	II		13