Adding days to the Date portion of DateTime throws off the Time portion
So I'm having an issue in Apex with the Date's addDays function. It seems that adding more than a certain amount of days throws off the time by one hour. It all seems so arbitrary so I'm wondering if this is a known thing in Salesforce or not.
DateTime aDate = System.now();
System.debug(aDate);
DateTime adjustedDate =
DateTime.newInstance(aDate.date().addDays(4), aDate.time());
System.debug(adjustedDate);
Running that in an execute anonymous box outputs the following:
2019-03-05 17:44:28
2019-03-09 17:44:28
That's all good. The same date separated by four days and the same time. Just as you'd expect. But... adding five or more days causes behavior I can't wrap my head around.
DateTime aDate = System.now();
System.debug(aDate);
DateTime adjustedDate =
DateTime.newInstance(aDate.date().addDays(5), aDate.time());
System.debug(adjustedDate);
This outputs the following:
2019-03-05 17:46:08
2019-03-10 16:46:08
It falls back by an hour. Any idea why or is this a known thing? I'm in central timezone so my time is actually -6 hours from the printed time.
apex datetime bug
asked Mar 5 at 18:01
DylanDylan
233
add a comment |
So I'm having an issue in Apex with the Date's addDays function. It seems that adding more than a certain amount of days throws off the time by one hour. It all seems so arbitrary so I'm wondering if this is a known thing in Salesforce or not.
DateTime aDate = System.now();
System.debug(aDate);
DateTime adjustedDate =
DateTime.newInstance(aDate.date().addDays(4), aDate.time());
System.debug(adjustedDate);
Running that in an execute anonymous box outputs the following:
2019-03-05 17:44:28
2019-03-09 17:44:28
That's all good. The same date separated by four days and the same time. Just as you'd expect. But... adding five or more days causes behavior I can't wrap my head around.
DateTime aDate = System.now();
System.debug(aDate);
DateTime adjustedDate =
DateTime.newInstance(aDate.date().addDays(5), aDate.time());
System.debug(adjustedDate);
This outputs the following:
2019-03-05 17:46:08
2019-03-10 16:46:08
It falls back by an hour. Any idea why or is this a known thing? I'm in central timezone so my time is actually -6 hours from the printed time.
apex datetime bug
asked Mar 5 at 18:01
DylanDylan
233
add a comment |
So I'm having an issue in Apex with the Date's addDays function. It seems that adding more than a certain amount of days throws off the time by one hour. It all seems so arbitrary so I'm wondering if this is a known thing in Salesforce or not.
DateTime aDate = System.now();
System.debug(aDate);
DateTime adjustedDate =
DateTime.newInstance(aDate.date().addDays(4), aDate.time());
System.debug(adjustedDate);
Running that in an execute anonymous box outputs the following:
2019-03-05 17:44:28
2019-03-09 17:44:28
That's all good. The same date separated by four days and the same time. Just as you'd expect. But... adding five or more days causes behavior I can't wrap my head around.
DateTime aDate = System.now();
System.debug(aDate);
DateTime adjustedDate =
DateTime.newInstance(aDate.date().addDays(5), aDate.time());
System.debug(adjustedDate);
This outputs the following:
2019-03-05 17:46:08
2019-03-10 16:46:08
It falls back by an hour. Any idea why or is this a known thing? I'm in central timezone so my time is actually -6 hours from the printed time.
apex datetime bug
asked Mar 5 at 18:01
DylanDylan
233
So I'm having an issue in Apex with the Date's addDays function. It seems that adding more than a certain amount of days throws off the time by one hour. It all seems so arbitrary so I'm wondering if this is a known thing in Salesforce or not.
DateTime aDate = System.now();
System.debug(aDate);
DateTime adjustedDate =
DateTime.newInstance(aDate.date().addDays(4), aDate.time());
System.debug(adjustedDate);
Running that in an execute anonymous box outputs the following:
2019-03-05 17:44:28
2019-03-09 17:44:28
That's all good. The same date separated by four days and the same time. Just as you'd expect. But... adding five or more days causes behavior I can't wrap my head around.
DateTime aDate = System.now();
System.debug(aDate);
DateTime adjustedDate =
DateTime.newInstance(aDate.date().addDays(5), aDate.time());
System.debug(adjustedDate);
This outputs the following:
2019-03-05 17:46:08
2019-03-10 16:46:08
It falls back by an hour. Any idea why or is this a known thing? I'm in central timezone so my time is actually -6 hours from the printed time.
apex datetime bug
apex datetime bug
asked Mar 5 at 18:01
DylanDylan
233
asked Mar 5 at 18:01
DylanDylan
233
asked Mar 5 at 18:01
DylanDylan
233
asked Mar 5 at 18:01
DylanDylan
233
asked Mar 5 at 18:01
DylanDylan
233
233
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
Daylight saving time 2019 in central timezone will begin at
2:00 AM on
Sunday, March 10
and ends at
2:00 AM on
Sunday, November 3
All times are in Central Time.
:)
answered Mar 5 at 18:07
Aayush KAayush K
1,11247
In other words, Daylight Saving Time begins in 5 days at this point in time. Which explains the discrepancy between adding 4 days and 5 days.
– Derek F
Mar 5 at 18:11
Wow. I completely forgot about Daylight savings time. Thank you!
– Dylan
Mar 5 at 18:14
+1. Great observation on Daylight changes.
– Jayant Das
Mar 5 at 20:17
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Daylight saving time 2019 in central timezone will begin at
2:00 AM on
Sunday, March 10
and ends at
2:00 AM on
Sunday, November 3
All times are in Central Time.
:)
answered Mar 5 at 18:07
Aayush KAayush K
1,11247
In other words, Daylight Saving Time begins in 5 days at this point in time. Which explains the discrepancy between adding 4 days and 5 days.
– Derek F
Mar 5 at 18:11
Wow. I completely forgot about Daylight savings time. Thank you!
– Dylan
Mar 5 at 18:14
+1. Great observation on Daylight changes.
– Jayant Das
Mar 5 at 20:17
add a comment |
Daylight saving time 2019 in central timezone will begin at
2:00 AM on
Sunday, March 10
and ends at
2:00 AM on
Sunday, November 3
All times are in Central Time.
:)
answered Mar 5 at 18:07
Aayush KAayush K
1,11247
In other words, Daylight Saving Time begins in 5 days at this point in time. Which explains the discrepancy between adding 4 days and 5 days.
– Derek F
Mar 5 at 18:11
Wow. I completely forgot about Daylight savings time. Thank you!
– Dylan
Mar 5 at 18:14
+1. Great observation on Daylight changes.
– Jayant Das
Mar 5 at 20:17
add a comment |
Daylight saving time 2019 in central timezone will begin at
2:00 AM on
Sunday, March 10
and ends at
2:00 AM on
Sunday, November 3
All times are in Central Time.
:)
answered Mar 5 at 18:07
Aayush KAayush K
1,11247
Daylight saving time 2019 in central timezone will begin at
2:00 AM on
Sunday, March 10
and ends at
2:00 AM on
Sunday, November 3
All times are in Central Time.
:)
answered Mar 5 at 18:07
Aayush KAayush K
1,11247
answered Mar 5 at 18:07
Aayush KAayush K
1,11247
answered Mar 5 at 18:07
Aayush KAayush K
1,11247
answered Mar 5 at 18:07
Aayush KAayush K
1,11247
1,11247
In other words, Daylight Saving Time begins in 5 days at this point in time. Which explains the discrepancy between adding 4 days and 5 days.
– Derek F
Mar 5 at 18:11
Wow. I completely forgot about Daylight savings time. Thank you!
– Dylan
Mar 5 at 18:14
+1. Great observation on Daylight changes.
– Jayant Das
Mar 5 at 20:17
add a comment |
In other words, Daylight Saving Time begins in 5 days at this point in time. Which explains the discrepancy between adding 4 days and 5 days.
– Derek F
Mar 5 at 18:11
Wow. I completely forgot about Daylight savings time. Thank you!
– Dylan
Mar 5 at 18:14
+1. Great observation on Daylight changes.
– Jayant Das
Mar 5 at 20:17
In other words, Daylight Saving Time begins in 5 days at this point in time. Which explains the discrepancy between adding 4 days and 5 days.
– Derek F
Mar 5 at 18:11
In other words, Daylight Saving Time begins in 5 days at this point in time. Which explains the discrepancy between adding 4 days and 5 days.
– Derek F
Mar 5 at 18:11
Wow. I completely forgot about Daylight savings time. Thank you!
– Dylan
Mar 5 at 18:14
Wow. I completely forgot about Daylight savings time. Thank you!
– Dylan
Mar 5 at 18:14
+1. Great observation on Daylight changes.
– Jayant Das
Mar 5 at 20:17
+1. Great observation on Daylight changes.
– Jayant Das
Mar 5 at 20:17
add a comment |
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