Here's what I wrote 2 years ago and reposted last year. The words ring as true as ever now. Since then the rememberances and research into her life have increased tremendously, with a video just released, and a book on the way. The Rebbetzin would be appalled at the coverage and attention her life is getting now, but nevertheless Chassidim do what they need to do.
Many a man will ask why the observance of 22 Shvat, a Yohrtzeit of a Rebbetzin? is she too one of the Rabbeyim that we observe her Yohrtzeit, visit her Tziyun, and learn the Mishnayes of her name? I too had trouble understanding it once upon a time, but I attribute that difficulty to my background and education.
Why her more than all others?
Many will say that it was her royal qualities and the way she conducted herself in her day-to-day life. The fact that she was hardly seen in public attributed to a mystique that has yet to reach its peak. With others it was the fact that with her passing the "golden days" of Lubavitch ended, with no farbrengens during the week, and no more Mamorim, save for a couple. One thing is for certain; Lubavitch owes her a tremendous debt of gratitude, and is repaying that debt. Without her insistance who knows if the Rebbe would've accepted the Nesius, and the outcome of the Seforim court case might have been very different. There is so much we do not know about her support and help of the Rebbe in all matters. There is no more appropriate way of repaying that debt than the current way.
(Ad Kan from 2 years ago.)