To say which day something is happening, use am:
Ich komme am Mittwoch.
I come on Wednesday.
In English, we generally put time phrases like am Dienstag and täglich towards the end of a sentence. In German, they go directly before or after the verb. You might feel like you’re talking like Yoda, but it’s totally normal!
Die Reise beginnt am Dienstag.
Am Dienstag beginnt die Reise.
The trip begins on Tuesday.