DateTime and Date Tags not show

You cannot use it in a page. You can only use this in the Contact Form 7 mod. It’s an extension of that mod.

Mine works just fine with this code in a Contact form:

<label> Your Name <span class="required">*</span>
    [text* your-name] </label>

<label> Your Email <span class="required">*</span>
    [email* your-email] </label>

<label>Requested Installation Time <span class="required">*</span></label>
[datetime datetime-158 date-format:mm/dd/yy time-format:hh:mmTT min-hour:7 max-hour:17 min-minute:0 max-minute:0 first-day:0 step-hour:1 step-minute:30 no-weekends]

<label>Additional information
    [textarea your-message] </label>

We try to accommodate all requested appointment times. We will call you to confirm your appointment or reschedule for a time that we have available.
[submit "Send Request"]