Timeline update

...

Rhaan 19	Zumm, a goblin monk of the Mockery, arrives and suggests he join forces with the party as they share a quarrel with Jalahand.
Rhaan 20	Zumm and two hand-picked goblin spies set out to reconnoitre Jalahand's village and size up his forces.
Rhaan 21	Verschoyle finishes translating the tomb inscriptions and sets off back to Castle Granis.
Rhaan 23	Verschoyle arrives back at Castle Granis. Zumm, along with two goblins called Skardash and Thurzar, arrive at Jalahand's village. They cause short-lived chaos and manage to kill the village's seer, a goblin bat-rider, and two ogres. They also free Merred Nastor, a human Silver Flame missionary.
Rhaan 25	Zumm, Skardash, Thurzar and Merred Nastor arrive back at Castle Granis.
Sypheros 3 (estimated)	The last of Valdash's 20 initial trainees reach Warrior level 2
Sypheros 5 (estimated)	Grim completes work on the first light ballista. The Worgs are ready to take riders.

The estimates for the completion of the training and the ballista assume that Valdash and Grim continue working on them rather than going on adventures.

Note that in Eberron all months have 28 days.