sp closing times in 87

I see the following closing times for the sp after the 87 crash in my database:

date(yyyymmdd) closingTime(hhmm)
19871016 1615
19871019 1615
19871020 1615
19871021 1615
19871022 1615
19871023 1400
19871026 1400
19871027 1400
19871028 1400
19871029 1400
19871030 1400
19871102 1430
19871103 1430
19871104 1430
19871105 1500
19871106 1500
19871109 1530
19871110 1530
19871111 1530
19871112 1615
19871113 1615
19871116 1615
19871117 1615
19871118 1615

Could someone confirm that the sp stopped trading early after the crash and
it is not an error in my database? Time is eastern time.
 
The NYSE closed early in the weeks after the 1987 crash.

From NYSE Holiday History:


"Oct. 23-30, 1987 (Fri-Fri) Shortened hours following market break of October 19 and record breaking volume – 2:00 pm close.

Nov. 2-4, 1987 (Mon-Wed) 2:30 pm close.

Nov. 5-6, 1987 (Thu-Fri) 3:00 pm close.

Nov. 9-11, 1987 (Mon-Wed) 3:30 pm close. Normal hours resumed November 12. Trading floor and clerical staff went on strike November 10-13 and were replaced by emergency reserve personnel. NYSE remained open throughout the strike."
 
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