File For Deliberations On Proper Entry Date Into A Retirement Plan

I work on an Excel file to determine property date of entry. While I have not completely worked out all of the bugs or the permutations or problems that may come up, I do feel that I have discerned an important part of the problem. The sheet where I set up my formulas and functions has the name 410a elig and coverage and should have a green tab.

To explain my reasoning; in this hypothetical situation, a company's plan has two dates of entry, January 1st and July 1st. An employee enters the plan on which of these two days follows closest or coincides with his or her attainment of 1,000 hours of service during the twelve months forming his or her initial eligibly computation period. If an employee starts work from January 2, 2005 to July 1, 2005, then that employee would enter the plan (provided he or she worked 1,000 hours during the initial eligibility computation period) on July 1st, 2006. If that employee started work from July 2, 2005 to December 31st 2005, then that person would enter the plan on January 1st, 2007.............

Some of the abbreviations or acronyms spelled out:
OYFDOH=One Year From Date of Hire; for now, the issue of leap years I will set aside
Month Function
Month=Month Function
JJ: January or July

OYFDOH MON JJ Year
8/7/2006 8 1 2007
1/2/2006 1 7 2006
6/1/2006 6 7 2006
3/1/2006 3 7 2006
8/1/2005 8 1 2006
6/1/2006 6 7 2006