Formatting or Parsing Date & DateTime in Salesforce

Matt/ March 23, 2017/ Salesforce

Over my career I’ve done a number of things, from ColdFusion then developing printer drivers, to .NET, PHP, Dynamics CRM, and now Salesforce, while playing around with things like python and android development in my spare time.  I’m not sure why, but I’ve never had as much of a problem with Date Formats anywhere else as I have with Salesforce.

I think part of this is due to the fact that DateTime objects were rarely really needed in my work during my other Salesforce gigs, but it seems to be a more recurring necessity now that I’m in Fintech.  I reached a point earlier this week where I had accumulated too much “personal technical debt”; that is, I got sick of hacking my way through date formats each time the need arose, and decided it was time to learn once and for all what I should have learned five years ago!

Ideally, you’re binding to variables, but there are times when you need a text representation, such as queries or integrations with third party APIs.  That’s the motivation I’ve got for finally getting this down.

The first option I stumbled across – and I think I’ve actually seen this used in code written by colleagues here – is JSON.serialize().  This would look something like:


This works, but my issue with this is your string will actually be wrapped in double quotes – perhaps not a big problem if you’re simply outputting information to the debugger as in this example, but if you’re using the string elsewhere it may not be desirable.

A less graceful way, but something that gives you the most control, is to use one of the Datetime.format() methods.  This is my preferred option.  The DateTime class gives a number of methods we can use to format dates:

  • format(dateFormatString)
  • format(dateFormatString, timezone)
  • formatGmt(dateFormatString)
  • formatLong()

I’ve become a fan of the formatGmt(dateFormatString) method because it seems the easiest – do everything in one timezone then display based on user locale settings.

What I’ve settled on as a preferred option, because it works, is


and when I need to format this for display, it’s a cinch to do so!

That got me thinking about other DateFormatStrings available in Salesforce and how advanced you can get with them.  The answer: you can get quite complex!

Based on the Java SimpleDateFormat, Salesforce understands a wide range of codes:

Letter Date or Time Component Presentation Examples
G Era designator Text AD
y Year Year 1996; 96
Y Week year Year 2009; 09
M Month in year (context sensitive) Month July; Jul; 07
L Month in year (standalone form) Month July; Jul; 07
w Week in year Number 27
W Week in month Number 2
D Day in year Number 189
d Day in month Number 10
F Day of week in month Number 2
E Day name in week Text Tuesday; Tue
u Day number of week (1 = Monday, …, 7 = Sunday) Number 1
a Am/pm marker Text PM
H Hour in day (0-23) Number 0
k Hour in day (1-24) Number 24
K Hour in am/pm (0-11) Number 0
h Hour in am/pm (1-12) Number 12
m Minute in hour Number 30
s Second in minute Number 55
S Millisecond Number 978
z Time zone General time zone Pacific Standard Time; PST; GMT-08:00
Z Time zone RFC 822 time zone -0800
X Time zone ISO 8601 time zone -08; -0800; -08:00

These patterns are typically repeated & combined, and their number determines the exact presentation based on the list of rules outlined in the Javadocs.

That gives you the power to come up with combinations such as the following:

Date and Time Pattern Result
“yyyy.MM.dd G ‘at’ HH:mm:ss z” 2001.07.04 AD at 12:08:56 PDT
“EEE, MMM d, ”yy” Wed, Jul 4, ’01
“h:mm a” 12:08 PM
“hh ‘o”clock’ a, zzzz” 12 o’clock PM, Pacific Daylight Time
“K:mm a, z” 0:08 PM, PDT
“yyyyy.MMMMM.dd GGG hh:mm aaa” 02001.July.04 AD 12:08 PM
“EEE, d MMM yyyy HH:mm:ss Z” Wed, 4 Jul 2001 12:08:56 -0700
“yyMMddHHmmssZ” 010704120856-0700
“yyyy-MM-dd’T’HH:mm:ss.SSSZ” 2001-07-04T12:08:56.235-0700
“yyyy-MM-dd’T’HH:mm:ss.SSSXXX” 2001-07-04T12:08:56.235-07:00
“YYYY-‘W’ww-u” 2001-W27-3

Click through the link above to peruse the rules from the Javadocs.  As I said, I always hacked my way around date formats but seeing the underlying rules for formatting and parsing really helped clear things up for me.

And finally, remember Salesforce has a list of Date Literals you can use as well – a definite time-saver for anybody working with dates!

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About Matt

Matt is a seasoned Salesforce Developer / Architect, with implementations of Sales Cloud, Service Cloud, CPQ, Experience Cloud, and numerous innovative applications built upon the platform. He started coding in grade 8 and has won awards ranging from international scholarships to internal corporate leadership awards. He is 37x Certified on the platform, including Platform Developer II, B2B Solution Architect and B2C Solution Architect.