Add page index for `Open Coding Day`

content/events/open-coding-day/1.md

 ---
 linktitle: "Open Coding Day"
+series: "Open Coding Day"
 title: "Open Coding Day: Come and Co-work on Your Projects"
 location: "HSBXL"
 eventtype: "co-working event"

content/events/open-coding-day/2.md

 ---
 linktitle: "Open Coding Day"
-title: "Open Coding Day: Come and Co-work on Your Projects"
+series: "Open Coding Day"
+title: "Open Coding Day: Come and Co-work on Your Pr
 location: "HSBXL"
 eventtype: "co-working event"
 start: "true"

content/events/open-coding-day/3.md

 ---
 linktitle: "Open Coding Day"
-title: "Open Coding Day: Come and Co-work on Your Projects"
+series: "Open Coding Day"
+title: "Open Coding Day: Come and Co-work on Your Pr
 location: "HSBXL"
 eventtype: "co-working event"
 start: "true"

content/events/open-coding-day/4.md

 ---
 linktitle: "Open Coding Day"
-title: "Open Coding Day: Come and Co-work on Your Projects"
+series: "Open Coding Day"
+title: "Open Coding Day: Come and Co-work on Your Pr
 location: "HSBXL"
 eventtype: "co-working event"
 start: "true"

content/events/open-coding-day/5.md

 ---
 linktitle: "Open Coding Day"
-title: "Open Coding Day: Come and Co-work on Your Projects"
+series: "Open Coding Day"
+title: "Open Coding Day: Come and Co-work on Your Pr
 location: "HSBXL"
 eventtype: "co-working event"
 start: "true"

content/events/open-coding-day/6.md

 ---
 linktitle: "Open Coding Day"
-title: "Open Coding Day: Come and Co-work on Your Projects"
+series: "Open Coding Day"
+title: "Open Coding Day: Come and Co-work on Your Pr
 location: "HSBXL"
 eventtype: "co-working event"
 start: "true"

content/events/open-coding-day/7.md

 ---
 linktitle: "Open Coding Day"
-title: "Open Coding Day: Come and Co-work on Your Projects"
+series: "Open Coding Day"
+title: "Open Coding Day: Come and Co-work on Your Pr
 location: "HSBXL"
 eventtype: "co-working event"
 start: "true"

content/events/open-coding-day/8.md

 ---
 linktitle: "Open Coding Day"
-title: "Open Coding Day: Come and Co-work on Your Projects"
+series: "Open Coding Day"
+title: "Open Coding Day: Come and Co-work on Your Pr
 location: "HSBXL"
 eventtype: "co-working event"
 start: "true"

content/events/open-coding-day/9.md

 ---
 linktitle: "Open Coding Day"
-title: "Open Coding Day: Come and Co-work on Your Projects"
+series: "Open Coding Day"
+title: "Open Coding Day: Come and Co-work on Your Pr
 location: "HSBXL"
 eventtype: "co-working event"
 start: "true"

content/events/open-coding-day/_index.md

+---
+linktitle: "Open Coding Day Events"
+title: "Open Coding Day Events"
+location: "HSBXL"
+eventtype: "co-working event"
+price: "Free"
+aliases: [/open-coding-day/]
+series: "Open Coding Day"
+start: "true"
+---
+
+Every Friday is Open Coding Friday,  
+a day of coding collaboration  
+for both members and visitors at HSBXL.
+
+## Upcoming Open Coding Day Events
+
+{{< events when="upcoming" series="Open Coding Day" >}}
+
+## Past Open Coding Day Events
+
+{{< events when="past" series="Open Coding Day" >}}