ISTWCMS-4184: fixing timeline to use numbers for months

source/_patterns/04-components/timeline/timeline.twig

@@ -2,16 +2,6 @@
     uw-timeline vertical-timeline vertical-{{ style }}  {{ modifier_classes }}
 {%- endset %}
 
-{#{% for year, timeline_item in timeline_items %}#}
-{#    {{ year }}#}
-{#    {% for month, entries in timeline_item %}#}
-{#        {{ month }}#}
-{#        {% for entry in entries %}#}
-{#            {{ entry.headline }}#}
-{#        {% endfor %}#}
-{#    {% endfor %}#}
-{#{% endfor %}#}
-
 <ol class="{{ modifier_classes }}">
     {% for year, timeline_item in timeline_items %}
 
@@ -23,7 +13,9 @@
 
                     {% if style == 'month' %}
                         <li>
-                            <span class="timeline-month">{{ month }}</span>
+                            {% set date = year ~ "-" ~ month ~ "-1" %}
+
+                            <span class="timeline-month">{{ date|date("M") }}</span>
                             <ol>
                     {% endif %}
 

source/_patterns/04-components/timeline/timeline.yml

 ---
-style: 'year'
+style: 'month'
 timeline_items:
   1966:
-    jun:
+    6:
       -
         headline: 'June 8, 1966'
         content: 'The Polyphemus moths have begun to emerge from their cocoons - 7 females and 2 males emerge in one day. I put the females into 3 separate mating boxes and leave them by an open window so that they can release their pheromones. By 1 am, they have called in a couple of male moths. I mate two of the females with wild males.'
@@ -23,7 +23,7 @@ timeline_items:
         content: 'Successfully mated a Cecropia moth at 2:40 am on June16th, and over the next 2 days she laid 153 eggs into a paper bag.  However, she presented odd behaviour while laying eggs, and laid thick bundles of 10-20 eggs on her legs rather than on the bag. Usually a female will lay groups of 3 eggs randomly, and never on her own body. I removed them from her and pulled apart the eggs before the substrate used to stick eggs to leaves completely dried. However I do not know if I have accidentally damaged any eggs in the process, despite my carefulness. This will be interesting to observe once the caterpillars begin to hatch in 10-14 days. '
         image: 'https://uwaterloo.ca/ecology-lab/sites/ca.ecology-lab/files/styles/thumbnail/public/june_16.jpg?itok=18idxfuY'
 
-    jul:
+    7:
       -
         headline: 'June 8, 1966'
         content: 'The Polyphemus moths have begun to emerge from their cocoons - 7 females and 2 males emerge in one day. I put the females into 3 separate mating boxes and leave them by an open window so that they can release their pheromones. By 1 am, they have called in a couple of male moths. I mate two of the females with wild males.'
@@ -43,7 +43,7 @@ timeline_items:
         headline: 'June 16 - 18, 1966'
         content: 'Successfully mated a Cecropia moth at 2:40 am on June16th, and over the next 2 days she laid 153 eggs into a paper bag.  However, she presented odd behaviour while laying eggs, and laid thick bundles of 10-20 eggs on her legs rather than on the bag. Usually a female will lay groups of 3 eggs randomly, and never on her own body. I removed them from her and pulled apart the eggs before the substrate used to stick eggs to leaves completely dried. However I do not know if I have accidentally damaged any eggs in the process, despite my carefulness. This will be interesting to observe once the caterpillars begin to hatch in 10-14 days. '
         image: 'https://uwaterloo.ca/ecology-lab/sites/ca.ecology-lab/files/styles/thumbnail/public/june_16.jpg?itok=18idxfuY'
-    aug:
+    8:
       -
         headline: 'aug 8, 1966'
         content: 'The Polyphemus moths have begun to emerge from their cocoons - 7 females and 2 males emerge in one day. I put the females into 3 separate mating boxes and leave them by an open window so that they can release their pheromones. By 1 am, they have called in a couple of male moths. I mate two of the females with wild males.'
@@ -65,7 +65,7 @@ timeline_items:
         image: 'https://uwaterloo.ca/ecology-lab/sites/ca.ecology-lab/files/styles/thumbnail/public/june_16.jpg?itok=18idxfuY'
 
   1967:
-    Jan:
+    1:
       -
         headline: 'Jan 8, 1967'
         content: 'The Polyphemus moths have begun to emerge from their cocoons - 7 females and 2 males emerge in one day. I put the females into 3 separate mating boxes and leave them by an open window so that they can release their pheromones. By 1 am, they have called in a couple of male moths. I mate two of the females with wild males.'