Date + time / hour comparison

Hi, I need to set a conditional logic where I compare an event start datetime (day + hour) with the current time but it doesn’t work with hours, only with day. I tried this :

<Set current_datetime ><Date format="timestamp" timezone="Europe/Paris" /></Set>
  <Set format_mec_start><Date format="timestamp"><Field mec_start_datetime /></Date></Set>

  <If check="{Get format_mec_start}" after_inclusive="{Get current_datetime}">
    true
<Else />
false
</If>```

thank you folks !