Tuesday, August 10th and Wednesday, August 11th is Rosh Chodesh Elul.
Elul is a two day Rosh Chodesh, which begins Monday night.
Please remember to add Yaale v’Yavo in your Tefillos and bentching beginning Monday night until Wednesday night.
Many have the minhag to mark Rosh Chodesh with a festive meal and reduced work activity. The latter custom is prevalent among women.
Special portions are added to the daily tefillos: Hallel is recited -- in its "partial" form -- following the Shacharit Amidah, also the Yaaleh V’yavo prayer is added to the Amidah and to Benching; Musaf is said while Tachnun and similar tefillos are omitted.