I’ve written about this little book before (click here), but did not include Rabbi Szpetman’s ideas on Lag BeOmer (The 33rd day of the Omer). Lag BeOmer is a festive day in the Jewish calendar. It is the 33rd day after the second night of Pesach (Passover), and is a day of great joy. It also commemorates the yahrzeit (anniversary of his death) of Rabbi Shimon ben Yochai, an illustrious and mystical sage.
Rabbi Joshua Szpetman, known by his diminutive name “Shiya”, was a native of Lublin, Poland. He had already been a Rosh Yeshiva (Head of a Rabbinical Academy) in Poland before he emigrated to London. He was the Rabbi of the Nelson Street Sephardishe Synagogue in the East End of London from the 1930s until his death in 1964.
Rabbi Szpetman’s background was Chassidic, and he befriended the Chassidic rebbes in London and graced many of their events
Here (in Yiddish) is what he has to say about Lag BeOmer, which he says is a Holiday for young children and students at Hebrew schools…:
Jewish Miscellanies 
Translate into English