If my employer deposits the 401k match every August, should I be investing my 6% starting January till August?

Hi,

My employer intends to match 50% of employee contribution, up to the first 6% of eligible salary (a 3% maximum match).

I understand that I only have to match 6% to get the full benefit from my employer. If my HR told me that they deposit every August to my 401k account, does that mean I don’t need to contribute for September till December?