Planned Start Date

Start On = Planned Start Date – this is a date set by a user (e.g. Project/Task/Issue owner) or Workfront indicating when a Project/Task/Issue is planned to be started: 

Planned Completion Date

Due On = Planned Completion Date - this is a due date planned by a user (e.g. project owner) or Workfront indicating when aProject/Task/Issue is planned to be completed:

For more see: https://support.workfront.com/hc/en-us/articles/217182387

Entry Date

Entry Date – the date a Project/Task/Issue is submitted by a user in Workfront: 

Simply speaking it’s the date a Project/Task/Issue is created and is not related to any further actions done with aProject/Task/Issue, i.e. logging time, marking aProject/Task/Issue as "Done", etc. This is more for tracking purposes.

Actual Start Date

Actual Start Date – the date a User actually starts working on a Project/Task/Issue.

By saying starts working, we mean a change of a status to something other than New, i.e. In Progress, Complete, etc. Even if a User logs time on thatProject/Task/Issue, that won’t generate an Actual Start Date unless the status is changed.

Note:

• Actual Start Date may not match a Planned Start Date of a tProject/Task/Issue as a User may start work later or earlier than is planned date: 

• “Must Start On” status affects a Planned Start Date not the Actual Start Date. This fixes a Planned Start Date to a date you specify. While the Actual Start Date is still working according to a logic described above.

For more see: https://support.workfront.com/hc/en-us/articles/217182277

Actual Completion Date

Actual Completion Date – the date a User actually completes working on aProject/Task/Issue. This may not match the Planned Completion Date.  

For more see: https://support.workfront.com/hc/en-us/articles/216632078-Actual-Completion-Date

Log Time:

A “log time” option is to submit the hours/days spent working a givenProject/Task/Issue.

For more see: https://support.workfront.com/hc/en-us/articles/217204037

The Date for which you Log Time

The date you log the time for is the same as the Hour Entry Date. This can be different from the current date you are logging the hours and this is not the actual start date of a task/project/issue.

Commit Date

Commit Date – the date set by the assignee as an estimation and commitment to complete a Project/Task/Issue:

Please, note: the Commit Date automatically affects the Projected Completion Date but not the Planned Completion Date. Still the Commit Date can be used by a project manager to reset the Planned Completion.

For more see https://support.workfront.com/hc/en-us/articles/216743818

Projected Start Date

Projected Start Date – this date shows the time a Project or Task is going to start depending on the progress of the other tasks/project’s tasks. A Projected Start Date may differ from the Planned Start Date in case it has a predecessor relationship with other tasks which are running behind the schedule.  

For more see: https://support.workfront.com/hc/en-us/articles/216632128

Projected Completion Date

Projected Completion date – this is the current time estimated to complete a given Project/Task/Issue, i.e. if everything goes smoothly and as planned the Projected Completion date should match the Planned Completion Date. Otherwise due to the delays on the predecessor tasks the Projected Completion Date will be different from the Planned Completion Date.

Both the Projected Start Date and the Projected Completion Date are shown in the Task/Project Details: 

For more see: https://support.workfront.com/hc/en-us/articles/217182397-Projected-Completion-Date