fix: start date in event wizard causing error

[maze-runnar]

Fixes # -Discussed in the meeting

Checklist

• I have read the Contribution & Best practices Guide.
• My branch is up-to-date with the Upstream development branch.
• The acceptance, integration, unit tests and linter pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

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[codecov]

Codecov Report

Merging #5168 into development will decrease coverage by 0.03%.
The diff coverage is n/a.

@@               Coverage Diff               @@
##           development    #5168      +/-   ##
===============================================
- Coverage        22.71%   22.67%   -0.04%     
===============================================
  Files              489      489              
  Lines             5181     5181              
  Branches            35       35              
===============================================
- Hits              1177     1175       -2     
- Misses            3999     4001       +2     
  Partials             5        5              

Impacted Files	Coverage Δ
app/components/widgets/forms/date-picker.js	66.66% <0.00%> (-16.67%)	⬇️

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[mariobehling]

Thank you. Works for me.