No, sorry.
It's not anything special.
For bloomtime, the first column is the cultivar name. The second column I use as a counter (at the bottom of the page, not seen, there is an autosum of how many cultivars are on that page; this makes it easy for me to know how many tets, tet seedlings, dips, etc. I have). Thereafter, bloom time is recorded on a quarter monthly scale, beginning in April and ending in October. Each quarter is one Excel column; I start the quarters on the 1st, 8th, 16th, and 24th of each month (multiples of 8). I leave room in each column to record the exact date of FFO and LFO. This makes it relatively easy to record bloom times. (Sometimes I miss the FFO or LFO, so there is no date. Sometimes I may forget to record (or be out of town) if a plant is in bloom during one quarter, in which case it gets an "?".)
Since most cultivars don't bloom at all here in April, those columns can also be used to insert short notes (such as the plant is weak, MIA, dead, or to be removed; the plant got rust, and so on).
Here is a screenshot of part of the diploid Excel sheet for bloom last season:
