SharePoint 2010 - InfoPath Time Picker

Creating a time picker in InfoPath is a real pain. I opted to not create the sharepoint lists and just load the options manually within the form. To pull this off you need to create 4 fields.

1. MyDateTime = DateTime control. The final location of the information. Not actually used in the form. Just a container for storage.
2. mDatePicker = Date control.
3. mHourPicker = Text box in drop down format. Options are 00 - 23.
4. mTimePicker = Text box in drop down format. Options are 00,15,30,45.

The concatenation used to apply the final value to MyDateTime is actually this, not what was in the article.
concat(mDatePicker, “T”, mHourPicker, “:”, mMinutePicker, “:00″)

This article does explain it quite well.
http://www.moderntoad.com/2012/02/23/infopath-date-hour-and-minute-picker-to-replicate-sharepoint-experience/