I want to remove the dash after start-date in the years-list of the component like it is possible in module by the "Condition on events with no specified end time" (https://www.jevents.net/frequently-asked-questions/custom-format-strings).

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Conditional Fields

There is limited support for conditional output in the format string. The module supports 3 different conditional flags:

a = Condition on all day events
e = Condition on events with no specified end time
m = Condition on events multi day events

You would use [a: xxxxxxxx] to output xxxxxxxx when the condition is true or [!a: yyyy] to output yyyy when the condition is not true.
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How can I use this in the components list?