Dear Yong Peng,

OYP> In M36, while the month Vesak is not specified, it did mention "in
OYP> the last month of summer" (gimhaana.m pacchime maase), which is
OYP> Vesak, the month before the start of the rainy season. Please correct
OYP> me if I am wrong.

In the PED article 'gimhaana.m pacchime maase' is explained as
'aasaa.lhimaase', i.e. July.

(see http://users.i.com.ua/~sangha/dharma/practice/moon.htm for
sequence of months)

metta,
Dimitry