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	Sanctorum Gregonii, Agape, Cionie et Herene, trium sororum	14
2	IIII NNS		15
3	III	Sancte Teodosie virginis	16
4	II	Obitum domini Ysidori episcopi, Spali, era DCLXL	17
5	NNS		18
6	VIII IDS		19
7	VII		20
8	VI		21
9	V		22
10	IIII	Ieiunium mensualem	23
11	III	Depositio Floresindi episcopi	24
12	II	Sancti Victoris, Bracara	25
13	IDS	Sancte Eugenie, Cordoba	26
14	XVIII KAL MDS		27
15	XVII		28
16	XVI	Sancte Engratie vel XVIII martyrum, Cesaraugusta	29
17	XV		30
May (Gregorian)
18	XIIII	Sancti Elevterii, episcopi martyris	1
19	XIII		2
20	XII		3
21	XI		4
22	X		5
23	VIIII	Sancti Victoris et Corone et Longini	6
24	VIII	Sancti Georgii	7
25	VII	Sancti Marci apostoli euangeliste	8
26	VI	Sancti Timothei	9
27	V		10
28	IIII	Sancti Prudentii et sociorum eius	11
29	III	Sancte Salse	12
30	II	Sancti Bartolomei	13