{% for date_str in data.dates %}
{% set day_images = [] %}
{% for img in data.images if img.date == date_str %}{% set x = day_images.append(img) %}{% endfor %}
{% set day_imgs = [] %}
{% set day_txts = [] %}
{% for img in day_images %}{% if img.filename %}{% set x = day_imgs.append(img) %}{% else %}{% set x = day_txts.append(img) %}{% endif %}{% endfor %}