fix timestamp format
some entries use a date in a format like this 2020/01/01
. This causes a problem for the display in leaflet.
We need to make sure that all timestamps are in the following format: 2020-01-01
some entries use a date in a format like this 2020/01/01
. This causes a problem for the display in leaflet.
We need to make sure that all timestamps are in the following format: 2020-01-01