spec: fix calendar spec timebomb
spec: fix calendar spec timebomb

%d returns a zero-padded date, meaning this breaks during
 the first 9 days of the month (e.g. "Aug 03" vs "Aug 3")

Change-Id: Id518ab9be84a394b25d43fad96f53a1de93841bb
Reviewed-on: https://gerrit.instructure.com/59817
Reviewed-by: Jeremy Stanley <b3f594e10a9edcf5413cf1190121d45078c62290@instructure.com>
Tested-by: Jenkins
Product-Review: James Williams  <3a5f4ed991dbfa5c9ef76ad729d240ca12f62180@instructure.com>
QA-Review: James Williams  <3a5f4ed991dbfa5c9ef76ad729d240ca12f62180@instructure.com>

instructure/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,antoniuslin/canvas-lms,skmezanul/canvas-lms,leftplusrightllc/canvas-lms,matematikk-mooc/canvas-lms,roxolan/canvas-lms,AndranikMarkosyan/lms,whalejasmine/canvas-lms,skmezanul/canvas-lms,antoniuslin/canvas-lms,matematikk-mooc/canvas-lms,sfu/canvas-lms,kyroskoh/canvas-lms,dgynn/canvas-lms,tgroshon/canvas-lms,sdeleon28/canvas-lms,antoniuslin/canvas-lms,utkarshx/canvas-lms,efrj/canvas-lms,matematikk-mooc/canvas-lms,jay3126/canvas-lms,HotChalk/canvas-lms,redconfetti/canvas-lms,greyhwndz/canvas-lms,grahamb/canvas-lms,efrj/canvas-lms,greyhwndz/canvas-lms,sdeleon28/canvas-lms,dgynn/canvas-lms,HotChalk/canvas-lms,roxolan/canvas-lms,grahamb/canvas-lms,jay3126/canvas-lms,leftplusrightllc/canvas-lms,AndranikMarkosyan/lms,juoni/canvas-lms,kyroskoh/canvas-lms,snehakachroo1/LSI_replica,skmezanul/canvas-lms,greyhwndz/canvas-lms,narigone/canvas,djbender/canvas-lms,fronteerio/canvas-lms,venturehive/canvas-lms,leftplusrightllc/canvas-lms,SwinburneOnline/canvas-lms,juoni/canvas-lms,venturehive/canvas-lms,efrj/canvas-lms,redconfetti/canvas-lms,leftplusrightllc/canvas-lms,djbender/canvas-lms,instructure/canvas-lms,redconfetti/canvas-lms,utkarshx/canvas-lms,dgynn/canvas-lms,snehakachroo1/LSI_replica,sfu/canvas-lms,whalejasmine/canvas-lms,sfu/canvas-lms,grahamb/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,efrj/canvas-lms,roxolan/canvas-lms,djbender/canvas-lms,skmezanul/canvas-lms,instructure/canvas-lms,greyhwndz/canvas-lms,kyroskoh/canvas-lms,HotChalk/canvas-lms,fronteerio/canvas-lms,matematikk-mooc/canvas-lms,narigone/canvas,whalejasmine/canvas-lms,whalejasmine/canvas-lms,SwinburneOnline/canvas-lms,tgroshon/canvas-lms,narigone/canvas,juoni/canvas-lms,instructure/canvas-lms,fronteerio/canvas-lms,SwinburneOnline/canvas-lms,grahamb/canvas-lms,redconfetti/canvas-lms,AndranikMarkosyan/lms,jay3126/canvas-lms,venturehive/canvas-lms,narigone/canvas,utkarshx/canvas-lms,kyroskoh/canvas-lms,fronteerio/canvas-lms,dgynn/canvas-lms,snehakachroo1/LSI_replica,HotChalk/canvas-lms,snehakachroo1/LSI_replica,venturehive/canvas-lms,sdeleon28/canvas-lms,utkarshx/canvas-lms,antoniuslin/canvas-lms,roxolan/canvas-lms,tgroshon/canvas-lms,SwinburneOnline/canvas-lms,jay3126/canvas-lms,tgroshon/canvas-lms,AndranikMarkosyan/lms,instructure/canvas-lms,sfu/canvas-lms,juoni/canvas-lms,grahamb/canvas-lms,sdeleon28/canvas-lms,instructure/canvas-lms,sfu/canvas-lms